per cent died due to lack of support, suicide, or after becoming a target of violence, where half of these deaths were of Aboriginal and Torres Strait Islander prisoners. Treatment of particular groups and minorities Indigenous Australians The wellbeing of Indigenous Australians is an ongoing issue in Australia. There is significant disparity in health between Indigenous and non-Indigenous Australians. In 2010–2012, the estimated life expectancy at birth for Aboriginal and Torres Strait Islander males was 69.1 years, and for females 73.7 years. This was 10.6 years lower than the life expectancy of non-Indigenous males, and 9.5 years lower than that of non-Indigenous females. A 2006 study by the Australian Institute of Health and Welfare showed that 70% of the Aboriginal population die before the age of 65, compared with 20% of non-Indigenous Australians. Additionally, the suicide rate among Aboriginal Australians is almost three times higher (at 4.2%) than the national average (1.5%). The roots of the present condition can be traced to the historical treatment of Aboriginal people and the dispossession of land that occurred following European colonisation of Australia, where a combination of disease, loss of land (and thus food resources) and violence decimated the Aboriginal population. Later, from the 1830s, colonial governments established the now controversial offices of the Protector of Aborigines in an effort to avoid mistreatment of Indigenous peoples and conduct government policy towards them. Christian churches in Australia sought to convert Aboriginal people, and were often used by government to carry out welfare and assimilation policies. The Caledon Bay crisis of 1932–4 saw one of the last incidents of frontier violence, which began when the spearing of Japanese poachers who had been molesting Yolngu women was followed by the killing of a policeman. As the crisis unfolded, national opinion swung behind the Aboriginal people involved, and the first appeal on behalf of an Indigenous Australian to the High Court of Australia was launched. Elsewhere around this time, activists like Sir Douglas Nicholls were commencing their campaigns for Aboriginal rights within the established Australian political system and the age of frontier conflict closed. In 1962, the Menzies Government's Commonwealth Electoral Act provided that all Indigenous Australians should have the right to enrol and vote at federal elections (prior to this, Indigenous people in Queensland, Western Australia and some in the Northern Territory had been excluded from voting unless they were ex-servicemen). The successor Holt Government called