Overseas Migration methodology

1. This page provides a reference of concepts, sources and methods relating to the collection and processing of overseas migration statistics, and the changes that occur from time to time that may impact the quality of overseas migration statistics. Changes can be due to any part of the end-to-end processing, from administrative passenger data collection to the dissemination of overseas migration statistics. They can range from the design, provision and collection of international passenger movement data through to the administrative systems and updates made by the Australian Government Department of Home Affairs. They can also result from better capture of passenger data, methodological improvements or improved processing systems.

Armstrong, J & McDonald, C April 2016, Why the drivers of migration matter for the labour market, Reserve Bank of New Zealand, Analytical Notes, Wellington.

Commonwealth Consolidated Acts, Acts Interpretation Act 1901,  http://classic.austlii.edu.au/au/legis/cth/consol_act/aia1901230/s33.html.

Commonwealth Consolidated Acts, Census and Statistics Act 1905,  http://www.austlii.edu.au/au/legis/cth/consol_act/casa1905241/.

Commonwealth Consolidated Acts, Migration Act 1958 ,  http://classic.austlii.edu.au/au/legis/cth/consol_act/ma1958118/.

Commonwealth Consolidated Acts, Norfolk Island Legislation Amendment Act 2015,  http://classic.austlii.edu.au/au/legis/cth/num_act//nilaa2015350/sch2.html.

United Nations 1998, Recommendations on Statistics of International Migration, Statistical Papers Series M, no. 58, rev. 1, Department of Economic and Social Affairs, Statistics Division, New York. 

1. The classification of countries used in this release is the ABS' Standard Australian Classification of Countries 2016. The entire historical series has been backcast using this version of the classification.

2. The statistics on country of residence or main destination have certain limitations as they rely on self-reported information collected on incoming passenger cards. For example, many travellers just list the UK on their passenger card rather than stating England, Scotland, Wales, or Northern Ireland.

3. Overseas arrivals and departures data covers Australia and its states and territories, as defined by the Australian Statistical Geography Standard (ASGS), Edition 3. Jervis Bay Territory, the Territories of Christmas Island, Cocos (Keeling) Islands and Norfolk Island are included as one spatial unit at the State and Territory level under the category of Other Territories. 

Historical changes to the State and Territory classification

4. Following the 1992 amendment to the Acts Interpretation Act, the Indian Ocean Territories of Christmas Island and the Cocos (Keeling) Islands were included as part of geographic Australia. To reflect this change, another category was created, known as Other Territories which also included Jervis Bay Territory (previously included with the Australian Capital Territory). Overseas arrivals and departures data for Other Territories commenced from February 1995.
            
5. Norfolk Island was included in the Other Territories category from July 2016 following the introduction of the Norfolk Island Legislation Amendment Act 2015. Prior to this, Norfolk Island was an external territory and not included within geographic Australia.

1. The ABS collects statistical information under the authority of the Census and Statistics Act, 1905. This requires that statistical output shall not be published or disseminated in a manner that is likely to enable the identification of a particular person or organisation.

2. Some techniques used to guard against identification or disclosure of confidential information in statistical tables are suppression of sensitive cells, random adjustments to cells with very small values and rounding. In these cases, data may not sum to totals due to the confidentialisation of individual cells.

3. The statistics in this release have been rounded to the nearest 10 to maintain confidentiality. Where figures have been rounded, discrepancies may occur between sums of component items and totals. All calculations and analysis are based on un-rounded data. Calculations made on rounded data may differ to those published.

4. To minimise risk of identifying individuals in aggregate statistics, perturbation is sometimes used to randomly adjust cell values available via services such as Table Builder. This technique involves small random adjustments of the data avoiding the release of identifiable statistics while maximising the range of information that can be released. These adjustments have a negligible impact on the underlying patterns. After perturbation, a given cell value will be consistent across all tables. Where figures have been perturbed, discrepancies may occur between sums of component items and totals.

1. Administrative information about persons arriving in, or departing from, Australia is collected via various processing systems, passport documents, visa information, and incoming passenger cards (see Passenger card images section). Aside from persons travelling as Australian or New Zealand citizens, persons travelling to Australia are required to provide information in visa applications. These administrative data are collected by the Department of Home Affairs under the authority of the Migration Regulations 1994 made under the Migration Act 1958.

2. ABS statistics on overseas migration are mainly compiled using information from Home Affairs sources. All overseas movement records are stored in Home Affairs' Travel and Immigration Processing System (TRIPS).

3. Each month all overseas arrivals and departures (OAD) movement records and related information, including those matched to an incoming passenger card, are supplied to the ABS and then processed. This OAD data is then the main input to produce quarterly overseas migration estimates. OAD statistics and related data quality issues are published on a monthly basis in Overseas Arrivals and Departures, Australia (cat. no. 3401.0).

4. From July 2017, due to the removal of the outgoing passenger card, the ABS has also used Medicare enrolment data. This is a secondary source of state or territory of residence information for Australian residents and is used for a small proportion of records. For further information see ABS Privacy Impact Assessment Report 'Traveller Information and Medicare Enrolment' released on 12 September 2017. 

5. Statistics in this release draw extensively on information provided by Home Affairs and Medicare. Their continued cooperation is very much appreciated. Without it, the wide range of statistics published by the ABS on overseas migration would not be available. Information received by the ABS is treated in strict confidence as required by the Census and Statistics Act 1905.

Prior to 1 July 2006, overseas migration estimation methods used a '12/12 month rule' to determine if a traveller contributed to Australia's estimated resident population (ERP). For a person to have immigrated or emigrated, they must have stayed in, or remained absent from, Australia for a continuous period of 12 out of 12 months. For more detailed information see the history of changes in this methodology page.

From 1 July 2006, overseas migration estimation methods used a '12/16 month rule' to determine if a traveller contributed to Australia's estimated resident population (ERP). For a person to have immigrated or emigrated, they must have stayed in, or were absent from, Australia for a period of 12 out of 16 months. The 12 months does not have to be continuous and is measured over a 16-month period. 

The 12/16 month rule therefore, takes account of those persons who may have left Australia briefly and returned, while still being resident for 12 months out of 16. Similarly, it takes account of Australians who live most of the time overseas but periodically return to Australia for short periods. For more detailed information see the history of changes in this methodology page.

For estimated resident population statistics, the Census year population estimates classify a person as an Australian resident if the person resides in Australia for a period of 12 months or more over a 16 month period. See also Estimated resident population (ERP) in this Glossary.

The ASGS brings all the regions for which the ABS publishes statistics within the one framework and has been in use for the collection and dissemination of geographically classified statistics since 1 July 2011. It is the current framework for understanding and interpreting the geographical context of statistics published by the ABS.

Prior to July 2006 a number of adjustments to overseas arrivals and departures were required. These mainly comprised adjustments to reflect differences between an individuals stated travel intentions (from the passenger card) and their actual recorded travel behaviour. If they changed from a long-term to a short-term traveller or vice versa it was referred to as 'category jumping'. For links to more detailed information see the history of changes in this methodology page.

Overseas arrivals and departures data are classified according to length of stay (in Australia or overseas), as recorded by travellers on passenger cards, or derived with reference to previous border crossings. There are three main categories of movement and 10 sub-categories:

Permanent movement;

• permanent arrivals (PA)
• permanent departures (PD) - only available prior to July 2007.

Long-term movement - has a duration of stay (or absence) of one year or more;

• long-term resident return (LTRR)
• long-term visitor arrival (LTVA)
• long-term resident departure (LTRD)
• long-term visitor departure (LTVD).

Short-term movement - has a duration of stay (or absence) of less than one year;

• short-term resident return (STRR)
• short-term visitor arrival (STVA)
• short-term resident departure (STRD)
• short-term visitor departure (STVD).

A census is the complete enumeration of a specific population at a point in time (as opposed to a survey, which enumerates a sample of the population). When the word is capitalised, "Census" refers to the national Census of Population and Housing. The Census is run by the ABS every five years and aims to count every person in Australia on Census night.

The Census of Population and Housing enumerates persons on the basis of where they were located on Census night. The Census also compiles information on people according to their place of usual residence. This means that Census counts of people can be produced according to their location on Census Night as well as their place of usual residence. Characteristics of households are based on persons usually resident in a dwelling.

Country of birth refers to the country which a person was born in. For overseas arrivals and departures data and overseas migration data, the country of birth is usually collected from a traveller's passport or visa information.

Country of citizenship is the nationality of a person. For overseas arrivals and departures data and overseas migration data, the country of citizenship is usually collected from a traveller's passport or visa information and in some cases from their passenger card.

Country of residence/stay is the country a traveller indicates on their passenger card.

• For overseas visitors to Australia, it is their country of residence prior to travel as recorded on their passenger card or visa.
• For Australian residents, it is the country they spent the most time abroad in (i.e. their country of stay).

The process of leaving one country to take up permanent or semi-permanent residence in another. See overseas migrant departures in this glossary.

The process of entering one country from another to take up permanent or semi-permanent residence. See overseas migrant arrivals in this glossary.

On arrival in Australia, all overseas visitors are asked to state their 'Intended length of stay in Australia'.

Australian residents who stay abroad for 12 months or more. For a list of the categories see category of travel in this glossary.

Australian residents returning after a recorded absence of 12 months or more overseas. For a list of the categories see category of travel in this glossary.

Overseas visitors who state that they intend to stay in Australia for 12 months or more (but not permanently). For a list of the categories see category of travel in this glossary.

Overseas visitors departing after a recorded stay of 12 months or more in Australia. For a list of the categories see category of travel in this glossary.

Overseas visitors/temporary entrants arriving in Australia and Australian residents returning to Australia are asked to state their main reason for journey using the following categories:

• convention/conference;
• business;
• visiting friends or relatives;
• employment;
• education;
• exhibition;
• holiday; and
• other.

For any distribution, the median value is that which divides the relevant population into two equal parts, half falling below the value, and half exceeding it. Thus, the median age is the age at which half the population is older and half is younger.

See overseas migrant arrival in this glossary.

See overseas migrant departure in this glossary.

An international migrant is defined as "any person who changes his or her country of usual residence" (United Nations 1998). The country of usual residence is the country in which a person lives i.e. the country in which they have a place to live where they normally spend the daily period of rest. A long-term international migrant is a person who moves to a country other than that of their usual residence for a period of at least a year (12 months), so that the country of destination effectively becomes their new country of usual residence.

In Australia, for the purposes of estimating overseas migration, and thereby the official population counts, a person is regarded as a usual resident if they have been (or are expected to be) residing in Australia for a period of 12 months or more over a 16 month period.

The movement of people across a specified boundary for the purpose of establishing a new or semi-permanent residence. Migration can be international (migration between countries) and internal (migration within a country).

Prior to July 2006 a number of adjustments to overseas arrivals and departures were required. These mainly comprised of adjustments designed to reflect differences between an individuals stated travel intentions (from the passenger card) and their actual recorded travel behaviour. If they changed from a long-term to a short-term traveller or vice versa it was referred to as 'category jumping'. In addition, adjustments were also required to transform numbers of overseas movements into numbers of travellers (combined they were referred to as 'migration adjustments'). For links to more detailed information see the history of changes in this methodology page.

Other Territories include Christmas Island, Cocos (Keeling) Islands, Jervis Bay Territory and Norfolk Island. For more information see the classifications section in this methodology page.

Overseas arrivals and departures (OAD) refer to the recorded arrival or departure of persons through Australian air or sea ports (excluding operational air and ships' crew). Statistics on OAD relate to the number of movements of travellers rather than the number of travellers (i.e. the multiple movements of individual persons during a given reference period are all counted).

Incoming international travellers who stay in Australia for 12 months or more over a 16-month period, who are not currently counted within the population, and are then added to the population. Overseas migrant arrivals are also referred to as immigrants.

Outgoing international travellers who leave Australia for 12 months or more over a 16-month period, who are currently counted within the population, and are then subtracted from the population. Overseas migrant departures are also referred to as emigrants.

See net overseas migration (NOM).

Passenger cards are completed by nearly all passengers arriving in Australia. Information including: country of previous residence, intended length of stay, main reason for journey, and state or territory of intended stay/residence is collected. An example of the current Australian passenger card is provided under 'Passenger card images' in the left hand side navigation bar.

Permanent arrivals include:

• travellers who arrive on a permanent migrant visas for the first time;
• New Zealand citizens who indicate for the first time an intention to migrate permanently; and
• those who are otherwise eligible to settle (e.g. overseas born children of Australian citizens).

For a list of the categories see category of travel in this glossary.

A visa allowing the holder to remain indefinitely in Australia's migration zone.

See usual residence.

After each Census, the ABS uses Census counts (adjusted for undercount) to construct a new base population figure for 30 June of the Census year. Rebasing is the process of updating population estimates for the five years between Censuses, to incorporate information from the most recent Census.

Residents temporarily overseas are outgoing international travellers (Australian residents and long term visitors to Australia) who are currently counted within the population and who leave Australia for less than 12 months over a 16 month period.

The movement of people to or from Australia's regions through immigration or emigration, where travellers satisfy the 12/16 month rule.

Sex ratio is the number of males per 100 females. 

Australian residents departing Australia for an overseas trip of less than 12 months duration. For a list of the categories see category of travel in this glossary.

Australian residents returning after a recorded stay of less than 12 months overseas. For a list of the categories see category of travel in this glossary.

Overseas visitors who intend to stay in Australia for less than 12 months. For a list of the categories see category of travel in this glossary.

Overseas visitors departing after a recorded stay of less than 12 months in Australia. For a list of the categories see category of travel in this glossary.

Those categories of the Migration Program where the core eligibility criteria are based on the applicant's employability or capacity to invest and/or do business in Australia. The immediate accompanying families of principal applicants in the skill stream are also counted as part of the skill stream.

This definition of skill stream is used by Home Affairs which administers the Migration Program.

The SACC provides guidelines for consistent collection, aggregation and dissemination of statistics by country. The Australian Bureau of Statistics (ABS) endorses the use of this classification when collecting, aggregating and disseminating data relating to characteristics such as birthplace and country of residence. In addition to its use by the ABS, the SACC is also designed for use in the broader Australian statistical community, including government agencies, private companies and community organisations.

See state or territory of usual residence.

State or territory of usual residence refers to the state or territory of usual residence of:

• the population (estimated resident population);
• the mother (birth collection); and
• the deceased (death collection).
   

In the case of overseas movements, state or territory of usual residence refers to the state or territory regarded by the traveller as the one in which they live or have lived. State or territory of intended residence is derived from the intended address given by settlers, and by Australian residents returning after a journey abroad. Particularly in the case of the former, this information does not necessarily relate to the state or territory in which the traveller will eventually establish a permanent residence.

See temporary visas.

Temporary entrant visas are visas permitting persons to come to Australia on a temporary basis for a specific purpose. Main contributors are tourists, international students, those on temporary work visas, business visitors and working holiday makers.

Within Australia, usual residence is the address of the dwelling at which a person considers themselves to currently live, either having lived there for some time or intending to live there for some time.

The usual residence of a newborn is that of the mother.

Permission or authority granted by the Australian Government to foreign nationals to travel to, enter and/or remain in Australia for a period of time or indefinitely.

1. Due to changes in the methods used to measure overseas migration estimates, caution should be used comparing them over time. This is especially so for estimates based on the '12/12 month rule' method compared to those using the '12/16 month rule' method. The table below describes the various methods used in Australia that have been applied to measuring overseas migration.

2. Prior to 1 July 2006, overseas migration estimation methods used a '12/12 month rule' to determine if a traveller contributed to Australia's estimated resident population (ERP). For a person to have immigrated or emigrated, they must have stayed in, or were absent from, Australia for a continuous period of 12 out of 12 months. 

3. Conceptually, migration estimates are based on counts of travellers rather than counts of overseas movements since travellers may have more than one movement in a particular reference period. Prior to July 2006 a number of adjustments to overseas arrivals and departures were required. These mainly comprised adjustments designed to reflect differences between an individual's stated travel intentions (from the passenger card) and their actual recorded travel behaviour. If they changed from a long-term to a short-term traveller and vice versa it was referred to as 'category jumping'. In addition, adjustments were also required to transform numbers of overseas movements into numbers of travellers (combined they were referred to as 'migration adjustments'). For more information refer to footnotes (d) and (e) in the table above.  

4. During a reconciliation of the 1996-2001 intercensal population growth estimates with the results of the 2001 Census of Population and Housing, the ABS identified a number of inconsistent results for the overseas migration estimates. These inconsistencies arose from a 1998 passenger card processing change and the measurement of temporary migration.

5. The ABS noted that the precise measurement of duration of stay in Australia (or absence) using a comparison of border crossing transactions may lead to a misleading categorisation of frequent travellers to short-term, when their overall period of stay or absence in a broader context was long-term punctuated by short journeys. For example, an international student in Australia for a three, or four, year course of study, who leaves Australia briefly each year for holiday or other reasons, would incorrectly not be added to estimates of Australia's population. This was because after the passage of time, they did not spend a continuous period of 12 months in Australia during their long-term period of stay in Australia (the previous '12/12 month rule' method of measurement). This was inconsistent with the intention behind the definition of an overseas (or international) migrant by the United Nations (United Nations 1998, 36) and the ABS' ERP conceptual definition. The use of single continuous periods of stay as the criteria (i.e. 12 continuous months) for classifying travellers was seen as a major shortcoming in the measurement of migration and consequently estimates of Australia's resident population.

6. Further, there were some travellers who self-identified as permanent immigrants and emigrants on Australian passenger cards, yet it was observed after less than a year, some permanent immigrants departed Australia and some permanent emigrants returned to Australia. The ABS also identified a need to convert the multiple border movements information for frequent travellers within a reference period to individual person estimates together with their travel history over time to avoid double counting.

7. The method for estimating overseas migration was reviewed in 2004 in response to the issues arising with the previous estimation of category jumping (i.e. changes between stated intended duration and actual duration). The review also addressed the changing patterns of migration, in particular the increased propensity for travellers to interrupt longer periods of stay or absence with short-term trips.

8. The change to a '12/16 month rule' method was adopted by the ABS for measuring overseas migration and has been contributing to Australia's ERP since September quarter 2006. It more closely aligns with the intention behind the international definitions set out by the United Nations (United Nations 1998, 36). The ABS has not changed the statistical conceptual definition of overseas migration. However, the method of measurement changed.

9. In an initiative to create a more efficient and streamlined process for travellers departing Australia, the outgoing passenger card was removed by Home Affairs from 1 July 2017. Due to the removal of the card, the ABS reviewed its overseas migration methodology and processing systems. From this review the most significant changes were:

• The inclusion of an additional month of movement data (allowing four months after the reference period) — this further reduced the pool of travellers required to use the propensity model, improving the accuracy of preliminary migration estimation; 
• Changes in data sources for state/territory of residence — data previously sourced from the outgoing passenger card is now collected from an incoming passenger card for that traveller or information from Medicare enrolment records for Australian residents;
• Incorporating improvements to the personal identifier (known as PID) for movement records — a consistent PID for each traveller is crucial for determining a traveller's actual duration in or out of the country. Updated PID data is supplied by Home Affairs each month and used to improve the quality of travel histories that are produced for each traveller. 

10. Historical estimates from September quarter 2011 onwards were revised using the new methods. Analysis had shown that the revision between preliminary and final estimates, using the new methodology, had also improved when compared to the previous method. For more information refer to footnote (k) in the table above. 

11. For detailed information on the 2017 changes to the main input data, overseas arrivals and departures data, including imputation, secondary sources used and information on the state/territory of residence, see History of changes in Overseas Arrivals and Departures, Australia, methodology (cat. no. 3401.0).

12. From 1 January 2022 onwards, due to the disruption to travel patterns during COVID-19, preliminary estimates are modelled on traveller behaviour from the corresponding quarter of 2018. Estimates prior to 1 January 2022 remain modelled on the behaviour of similar travellers from one year earlier. 

1. The method used in Australia for estimating overseas migration employs the '12/16 month rule'. For the purposes of overseas migration, a person who is not already resident in Australia, is added to the estimated resident population (ERP) if they travel to Australia and remain present in Australia for 12 months or more (i.e. an overseas migrant arrival) thus becoming an Australian resident. Likewise, an Australian resident is removed from the population if they leave Australia for 12 months or more (i.e. an overseas migrant departure). The 12 months does not have to be continuous and is measured over a 16 month period. The person considered to have migrated, is added or removed from the ERP from the date they arrived or departed, i.e. from the beginning of the 16 month calculation period.

2. To measure a traveller's actual duration of stay, the ABS uses a unique personal identifier provided with the administrative data supplied by Home Affairs. To be able to apply the '12/16 month rule', the personal identifier is used to match a traveller's movements over time and construct a traveller's movement history recording each arrival and departure. This method is applied for all travellers who cross Australia's international border. 

3. Estimates of overseas migration are required less than six months after the reference quarter for the production of quarterly ERP. At that time, complete traveller histories for the 16 months following a reference quarter are not available. To obtain the required estimates in the absence of complete duration information, preliminary overseas migration estimates are initially modelled using past traveller migration propensities. Due to the disruption to travel patterns during COVID-19, from 1 January 2022 onwards preliminary estimates are modelled on traveller behaviour from the corresponding quarter of 2018. Estimates prior to 1 January 2022 remain modelled on the behaviour of similar travellers from one year earlier. The characteristics that match similar travellers for preliminary modelling are: age, country of citizenship, direction of first and last movement in the reference quarter, initial ERP status, time spent out of Australia, and visa group. To create the preliminary estimates, the migration propensities determined for the donor groupings from either one year earlier, or from 2018, are applied to similarly grouped travellers from the reference quarter being estimated.

4. The majority of overseas travellers in a given reference quarter take a trip of short duration. The ERP status of most short-term travellers can be determined based on data available at the time of estimation. This means for many individuals that their ERP status can be resolved without the need for them to be processed through the preliminary propensity model. For example, an Australian resident counted in the ERP at the beginning of a quarter, may commence a holiday during that quarter and then return to Australia two weeks later. Once four months since their return has passed without a further departure, they can be determined to still be in Australia’s population at the end of the reference quarter. This is because, as counted from the date of their original departure, it will no longer be possible for them to be out of Australia for more than 12 months out of 16.  

5. This determination of the ERP status of short-term travellers reduces the proportion of travellers which require modelled estimation to less than 30% of travellers in the quarter. This significantly increases the predictive accuracy of the model. 

6. As mentioned above, most short-term travellers can have their ERP status determined based on data available at the time of estimation. However, as more time passes after the initial overseas movement, the ERP status can be determined for more individuals. Therefore, as each new quarters data becomes available the pool of travellers requiring estimation by the propensity model for the original reference period reduces further and a revision is applied to the original preliminary estimation.

7. It is with the final overseas migration estimates that the '12/16 month rule' can be applied to all travellers. Once data on overseas movements become available for the 16 months following a reference period is available for all travellers, final overseas migration estimates can be calculated from the travellers' durations of stay. Final overseas migration estimation methods determine if a traveller, through their actual duration of stay being in or out of Australia for 12 months or more, should be added or removed from the overseas migration estimates, and consequently ERP.

1. The status of quarterly overseas migration estimates changes over time from preliminary, to revised, to final. 

2. Although this publication reports on annual data, the ABS produces estimates each quarter. Overseas migration, at the national level, is one of the three components of population change (birth, deaths and overseas migration). The migration estimates contribute to the ABS' population estimates and are released each quarter in the National, state and territory population publication (cat. no. 3101.0).  

1. Recommendations published by the United Nations define an international migrant as "any person who changes his or her country of usual residence", and state that "the change of country of usual residence necessary to become an international migrant must involve a period of stay in the country of destination of at least a year" (United Nations 1998, 32 & 36). 

2. In Australia, for the purposes of overseas migration (or international migration), a person is added to the population if they have been (or expect to be) residing in Australia for 12 months or more (i.e. an overseas migrant arrival) thus becoming an Australian resident. Likewise, an Australian resident is removed from the population if they leave Australia for 12 months or more (i.e. an overseas migrant departure). The 12 months does not have to be continuous and is measured over a 16-month period. 

3. Conceptually, the term net overseas migration (NOM) is the difference between the number of overseas migrant arrivals and the number of overseas migrant departures.  Therefore, whether an international traveller is counted in or out of the population is determined by their exact duration of stay in or away from Australia over the subsequent 16 months after arrival or departure. To identify overseas migrants, all recorded movements of travellers who cross Australia's international border are processed to assess their exact duration of stay.

4. Australia's measurement of overseas migration includes all international travellers regardless of their country of citizenship or legal status, with the exception of foreign diplomatic personnel and their families. 

5. Statistics on overseas migration exclude: all travellers whose duration of stay is less than 12 months; operational air and ships' crew; travellers in transit who pass through Australia but are not cleared for entry; passengers on pleasure cruises commencing and finishing in Australia. From 1 July 2006, foreign diplomatic personnel and their families were also able to be excluded.

1. The ABS may have other relevant data available on request. Generally, a charge is made for providing this information. Enquiries should be made to the National Information and Referral Service on 1300 135 070.

2. The following variables for overseas migration data may be made available on request:

• Age
• Country of birth
• Country of citizenship
• Country of previous residence
• Direction
• Category of travel (permanent departures not available from Sep quarter 2011)
• Main reason for journey (not available for permanent movements, residents departing or visitors departing)
• Marital status (not available from Sep quarter 2011 or for Australian and New Zealand citizens)
• Reference quarter/year (available from Dec quarter 2003)
• Sex
• State or territory of residence
• Status (preliminary, revised or final)
• Visa applicant type (primary or secondary applicant - available from Sep quarter 2011)
• Visa subclass (includes separate groups for Australian citizens and NZ citizens)