According to the Australian Bureau of Statistics (ABS), Australia's estimated resident population (ERP) was:
Growth: +339,200 (+1.47%) in the financial year 2013–14.
NOM drove 53% of growth—skilled migration, family reunion, humanitarian, students (temporary but counted in ERP if 12/16-month stay).
Australia's population doubled since 1970 (12.7M). Projected 30M+ by 2030–35. 2013–14 was peak mining-boom migration; NOM fell sharply after 2015 policy changes. COVID-19 caused first quarterly decline since 1916 (June 2020 quarter).
The 23.13M figure (June 2013) is the official benchmark for that period—used for funding formulas, electoral boundaries, infrastructure planning.