for males and females that are, respectively, 11 and 17 years lower than those of non-indigenous Australians. Some remote Indigenous communities have been described as having "failed state"-like conditions. Country of birth In 2019, 30% of the Australian resident population, or 7,529,570 people, were born overseas. The following table shows Australia's population by country of birth as estimated by the Australian Bureau of Statistics in 2021. It shows only countries or regions or birth with a population of over 100,000 residing in Australia. For more information about immigration see Immigration to Australia and Foreign-born population of Australia. Language Although Australia has no official language, English has always been entrenched as the de facto'' national language. Australian English is a major variety of the language with a distinctive accent and lexicon, and differs slightly from other varieties of English in grammar and spelling. General Australian serves as the standard dialect. At the 2021 census, English was the only language spoken in the home for 72% of the population. The next most common languages spoken at home are Mandarin (2.7%), Arabic (1.4%), Vietnamese (1.3%), Cantonese (1.2%) and Punjabi (0.9%). Over 250 Indigenous Australian languages are thought to have existed at the time of first European contact, of which fewer than twenty are still in daily use by all age groups. About 110 others are spoken exclusively by older people. At the time of the 2006 census, 52,000 Indigenous Australians, representing 12% of the Indigenous population, reported that they spoke an Indigenous language at home. Australia has a sign language known as Auslan, which is the main language of about 10,112 deaf people who reported that they use Auslan language at home in the 2016 census. Religion Australia has no official religion; its Constitution prohibits the Commonwealth government, but not the states, from establishing one, or interfering with the freedom of religion. At the 2021 Census, 38.9% of the population identified as having "no religion", up from 15.5% in 2001. The largest religion is Christianity (43.9% of the population). The largest Christian denominations are the Roman Catholic Church (20% of the population) and the Anglican Church of Australia (9.8%). Multicultural immigration since the Second World War has led to the growth of non-Christian religions, the largest of which are Islam (3.2%), Hinduism (2.7%), Buddhism (2.4%), Sikhism (0.8%), and Judaism (0.4%). In 2021, just under 8,000 people declared an affiliation with traditional Aboriginal religions.