Subnational Population Projections

The 'cohort component' method was used to derive the population projections. Using this method, the base population is projected forward by adding new birth cohorts and calculating the effect of deaths and migration within each age-sex group (or cohort) according to the specified mortality and migration assumptions. New birth cohorts are added to the population by applying the specified fertility assumptions to the female population of childbearing age.

Base population

These projections have as a base the estimated resident population of each area at 30 June 2013. This population was based on the census usually resident population count of each area at 5 March 2013 with adjustments for:

1. net census undercount
2. residents temporarily overseas on census night
3. births, deaths, and net migration between census night (5 March 2013) and 30 June 2013
4. reconciliation with demographic estimates at ages 0–9 years.