Since the end of the White Australia policy in 1973, Australia has pursued an official policy of multiculturalism and has the world's eighth-largest immigrant population, with immigrants accounting for 30 percent of the population in 2019. A large and continuing wave of immigration to Australia from across the world has continued into the 21st century, with Asia now being the largest source of immigrants. A smaller proportion are descended from Australia's indigenous peoples, comprising Aboriginal Australians, Aboriginal Tasmanians and Torres Strait Islanders.