3.2 CHARACTERISTICS OF LINKED AND UNLINKED 2006 CENSUS SAMPLE

Table 6 shows the distribution of key populations across the 2006 Census, the 2006 Census sample and the ACLD.

										ACLD
				2006 Census			2006 Census sample			Original results			Weighted results(a)
				(no.)	(%)		(no.)	(%)		(no.)	(%)		(no.)	(%)
Sex
	Male			9 896 500	49.3		480 285	49.0		390 487	48.8		9 193 092	49.4
	Female			10 165 146	50.7		499 372	51.0		410 274	51.2		9 432 201	50.6
State/Territory of usual residence
	New South Wales			6 549 174	32.6		323 136	33.0		263 369	32.9		6 093 946	32.7
	Victoria			4 932 422	24.6		244 095	24.9		203 668	25.4		4 624 754	24.8
	Queensland			3 904 531	19.5		192 606	19.7		154 013	19.2		3 635 806	19.5
	South Australia			1 514 340	7.5		75 481	7.7		62 239	7.8		1 445 720	7.8
	Western Australia			1 959 088	9.8		95 795	9.8		77 921	9.7		1 858 559	10.0
	Tasmania			476 481	2.4		23 787	2.4		19 583	2.4		465 052	2.5
	Northern Territory			192 899	1.0		8 469	0.9		6 226	0.8		179 713	1.0
	Australian Capital Territory			324 034	1.6		16 186	1.7		13 680	1.7		319 439	1.7
Age group (years)
	0-9			2 579 496	12.9		127 331	13.0		114 298	14.3		2 551 524	13.7
	10-19			2 756 102	13.7		132 937	13.6		107 761	13.5		2 541 650	13.6
	20-29			2 684 371	13.4		128 760	13.1		97 973	12.2		2 348 272	12.6
	30-39			2 893 058	14.4		140 271	14.3		117 655	14.7		2 800 173	15.0
	40-49			2 942 353	14.7		142 911	14.6		123 946	15.5		2 868 511	15.4
	50-59			2 574 589	12.8		126 285	12.9		108 962	13.6		2 473 288	13.3
	60-69			1 733 297	8.6		86 385	8.8		71 906	9.0		1 640 081	8.8
	70-79			1 168 675	5.8		58 277	5.9		42 262	5.3		993 870	5.3
	80 and over			729 705	3.6		36 502	3.7		16 002	2.0		408 018	2.2
Indigenous status
	Non-Indigenous			18 266 814	91.1		942 253	96.2		775 419	96.8		17 806 585	95.6
	Aboriginal and/or Torres Strait Islander			455 027	2.3		21 985	2.2		14 802	1.8		561 088	3.0
		Aboriginal		407 700	2.0		19 697	2.0		13 340	1.7		507 554	2.7
		Torres Strait Islander		29 515	0.1		1 449	0.1		923	0.1		32 876	0.2
		Both Aboriginal and Torres Strait Islander		17 812	0.1		839	0.1		543	0.1		20 805	0.1
	Not stated			1 133 449	5.6		15 416	1.6		10 530	1.3		257 343	1.4
	Overseas visitor			206 357	1.0		0	0.0		0	0.0		0	0.0
Total(b)(c)(d)				20 061 646	100		979 661	100		800 759	100		18 625 246	100
(a) For more information on weighting see chapter 3.4. (b) Data presented in the table have been confidentialised. As a result, the sum of individual categories may not align with totals. (c) Includes Other Territories. (d) Includes Migratory areas.

The distribution of the ACLD file by sub-population was generally well aligned with both the 2006 Census sample and the entire 2006 Census. When looking at the relative difference between these proportions, however, some differences are more clearly observed.

Compared with the entire 2006 Census, the linked ACLD contains relatively more records for people aged 0-9 years, and to a lesser extent those aged 40-49 years, 50-59 years and 60-69 years. By contrast, the ACLD contains relatively fewer records for people aged 20-29 years and 80 years and over. There is also relatively fewer people of Aboriginal and Torres Strait Islander origin in the ACLD, than the entire 2006 Census (1.8% compared with 2.3%). The corresponding weighted estimate, however, represents 3.0% of the total population, which is attributed to benchmarking the 2006 sample to the Aboriginal and Torres Strait Islander population in 2011 and therefore to the higher level of identification observed in the 2011 Census than in 2006 (see section 3.4).

In general, the distribution of weighted counts for the linked ACLD file is close to that of the entire 2006 Census, but it is not designed to produce counts corresponding to the population in 2006. Rather, the weighted population is that of people who were in scope of both the 2006 and 2011 Censuses (see section 3.4). Thus, for example, the lower proportion of older people in the linked file, even after weighting, reflects that impact of deaths on the 2006 sample that occurred between 2006 and 2011.

Further data cubes, demonstrating more detailed population distributions, are provided as an attachment to this Information paper.

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