Between 1788 and 1868, about 162,000 convicts were transported from Britain and Ireland to various penal colonies in Australia. The British Government began transporting convicts overseas to American colonies in the early 18th century. When transportation ended with the start of the American Revolution, an alternative site was needed to relieve further overcrowding of British prisons and hulks. Earlier in 1770, James Cook charted and claimed possession of the east coast of Australia for Britain. Seeking to pre-empt the French colonial empire from expanding into the region, Britain chose Australia as the site of a penal colony, and in 1787, the First Fleet of eleven convict ships set sail for Botany Bay, arriving on 20 January 1788 to found Sydney, New South Wales, the first European settlement on the continent. Other penal colonies were later established in Van Diemen's Land (Tasmania) in 1803 and Queensland in 1824. Western Australia – established as Swan River Colony in 1829 – initially was intended solely for free settlers, but commenced receiving convicts in 1850. South Australia and Victoria, established in 1836 and 1850 respectively, officially remained free colonies. However, a population that included thousands of convicts already resided in the area that became known as Victoria. Penal transportation to Australia peaked in the 1830s and dropped off significantly in the following decade, as protests against the convict system intensified throughout the colonies. In 1868, almost two decades after transportation to the eastern colonies had ceased, the last convict ship arrived in Western Australia. The majority of convicts were transported for petty crimes. More serious crimes, such as rape and murder, became transportable offences in the 1830s, but since they were also punishable by death, comparatively few convicts were transported for such crimes. Approximately 1 in 7 convicts were women, while political prisoners, another minority group, comprise many of the best-known convicts. Once emancipated, most ex-convicts stayed in Australia and joined the free settlers, with some rising to prominent positions in Australian society. However, convictism carried a social stigma and, for some later Australians, being of convict descent instilled a sense of shame and cultural cringe. Attitudes became more accepting in the 20th century, and it is now considered by many Australians to be a cause for celebration to discover a convict in one's lineage. Almost 20% of modern Australians, in addition to 2 million Britons, have some convict ancestry. The convict era has