Sub-Saharan Africa is the region most affected. In 2010, an estimated 68% (22.9 million) of all HIV cases and 66% of all deaths (1.2 million) occurred in this region.[4] This means that about 5% of the adult population in this area is infected.[5] Here, in contrast to other regions, women compose nearly 60% of cases.[4] South Africa has the largest population of people with HIV of any country in the world, at 5.9 million.[4] In Tanzania, HIV/AIDS was reported to have a prevalence of 6% among Tanzanian adults aged 15–49 in 2007-2008. This figure is lower than 2003 when the country's HIV/AIDS prevalence was 8.8%.[6]