 Another factor is urbanisation, with 89% of its population living in a handful of urban areas, Australia is one of the world's most urbanised countries.The life expectancy of Australia in 2015–2017 was 83.2 years, among the highest in the world.Australia generally doesn't collect data on race, with the exception of Australian Aboriginals and Torres Strait Islanders, however the Australian census asks respondents to nominate their ancestry.