Population: 24 million1 Age structure 0-14 years 15-24 years 25-54 years 55-64 years 65+ years 2 18% 13.3% 41.8% 11.8% 15.1% 3 51% of men and 45% of women Facebook users are between 18-34 years of age AUSTRALIA TOP 5 CITIES by population 4 Sydney | Melbourne | Brisbane | Perth | Adelaide 5 Official language: English 97% Major religion: Christianity 6 6 GDP PER CAPITA PPP 2017 (projected) GDP PER CAPITA PPP 2020 (projected) $44,915 $48,674