desert, Gibson Desert, Great Victoria Desert, and Nullarbor Plain. In 1831 Scottish botanist Robert Brown produced a scientific paper, General view of the botany of the vicinity of Swan River. It discusses the vegetation of the Swan River Colony. Demographics Europeans began to settle permanently in 1826 when Albany was claimed by Britain to forestall French claims to the western third of the continent. Perth was founded as the Swan River Colony in 1829 by British and Irish settlers, though the outpost languished. Its officials eventually requested convict labour to augment its population. In the 1890s, interstate immigration, resulting from a mining boom in the Goldfields region, resulted in a sharp population increase. Western Australia did not receive significant flows of immigrants from Britain, Ireland or elsewhere in the British Empire until the early 20th century. At that time, its local projects—such as the Group Settlement Scheme of the 1920s, which encouraged farmers to settle the southwest—increased awareness of Australia's western third as a destination for colonists. Led by immigrants from the British Isles, Western Australia's population developed at a faster rate during the twentieth century than it had previously. After World War II, both the eastern states and Western Australia received large numbers of Italians, Croatians and Macedonians. Despite this, Britain has contributed the greatest number of immigrants to this day. Western Australia—particularly Perth—has the highest proportion of British-born of any state: 10.3% in 2011, compared to a national average of 5.1%. This group is heavily concentrated in certain parts, where they account for a quarter of the population. Perth's metropolitan area (including Mandurah) had an estimated population of 2,043,138 in June 2017 (79% of the state). Other significant population centres include Bunbury (73,989), Geraldton (37,961), Kalgoorlie-Boulder (30,420), Albany (33,998), Karratha (16,446), Broome (14,501) and Port Hedland (14,285). Ancestry and immigration At the 2016 census, the most commonly nominated ancestries were: 3.1% of the population, or 75,978 people, identified as Indigenous Australians (Aboriginal Australians and Torres Strait Islanders) in 2016. Language At the 2016 census, 75.2% of inhabitants spoke only English at home, with the next most common languages being Mandarin (1.9%), Italian (1.2%), Vietnamese (0.8%), Cantonese (0.8%) and Tagalog (0.6%). Religion According to the 2021 census, Christianity is the major religious affiliation in WA, followed by 41.1% of its population. In 1971, Christianity was followed by 85.5% of the population and it has been declining since, while the