Each year Australia's population increases as a result of both natural increase (births minus deaths) and net overseas migration (NOM). In recent years NOM has accounted for over half of the population growth at the national level.
In 2009-10, the preliminary estimate of NOM was 215,600 persons, representing 57% of Australia's population growth for the year.
Net interstate migration in 2009-10, was a source of population loss for New South Wales, South Australia and the Northern Territory, subtracting 10,500 persons, 3,000 persons and 800 persons respectively from their populations.