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NET INTERSTATE MIGRATION
Net interstate migration (NIM) is the net gain or loss of population through the movement of people from one state or territory of usual residence to another. It is an important component required to calculate Australia's estimated resident population at the state and territory level see Australian Demographic Statistics (cat. no. 3101.0). During 2015-16, it was estimated that 366,400 people moved interstate, an increase of 8.1% from the number of people who moved during the previous year. In 2014-15, there were 339,000 people who moved interstate, a decrease of 2.9% from the number of people who moved in 2013-14 (349,000 persons).
Footnote(s): (a) Estimates for 2015-16 are preliminary - see paragraph 9 of the Explanatory Notes.
Source(s): Migration, Australia (cat. no. 3412.0)
Net interstate migration can be a source of population gain or loss for a state or territory. In the year ended 30 June 2016, NIM was a source of net population loss for New South Wales (-11,300 persons), Western Australia (-7,700 persons), South Australia (-6,400 persons), the Northern Territory (-2,700 persons) and the Australian Capital Territory (-200 persons). Those states and territories where NIM contributed positively to population growth were Victoria (16,700 persons), Queensland (11,600 persons) and Tasmania (42 persons).
Over the decade ending June 2016, Queensland has been the only state to maintain annual NIM gains. The size of these gains have been declining over the past ten years, from 23,400 in 2006-07 to 6,400 persons in 2014-15, however this year has increased to 11,600.
In contrast, New South Wales and South Australia have both recorded annual NIM losses each year for the past decade. New South Wales has continually recorded the largest annual losses, with losses ranging between 26,300 persons in 2006-07 and 6,600 persons in 2014-15, with an annual average net loss of 14,600 persons. South Australia recorded an annual average net loss of 3,700 persons, with losses ranging between 6,400 persons in 2015-16 and 2,400 persons in 2011-12.
Gains in NIM for Western Australia increased from 5,400 persons in 2006-07 to peak at 11,400 persons in 2011-12 before decreasing to a net loss of 7,700 persons in 2015-16.
Over the past decade, Victoria recorded annual NIM losses from 2006-07 to 2007-08 and then annual NIM gains in the eight years from 2008-09 to 2015-16 resulting in an annual average net gain of 4,700 persons. In 2015-16, Victoria recorded its largest NIM gain in the last ten years with 16,700 persons.
NIM in the remaining State and Territories has fluctuated throughout the past decade resulting in annual average net losses in the Northern Territory and Tasmania (1,200 persons and 430 persons respectively) and an annual average net gain in the Australian Capital Territory (220 persons).
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