The demographics of South Africa encompasses about 50 million people of diverse origins, cultures, languages, and religions. The last census was held in 2011 and the next will be taken anywhere from 2016-2021.
Even though the population of South Africa has increased in the past decade (primarily due to immigration), the country had an annual population growth rate of −0.051% in 2010 (CIA est.), where the birth rate is higher than the death rate but there is a net emigration rate. South Africa is home to an estimated 5 million illegal immigrants, including some 3 million Zimbabweans. A series of anti-immigrant riots occurred in South Africa beginning on 11 May 2008.
The population of Africa has grown rapidly over the past century, and consequently shows a large youth bulge, further reinforced by a low life expectancy of below 50 years in some African countries. The population doubled in the period 1982–2009 and quadrupled from 1955–2009, according to United Nations estimates. The total population of Africa is estimated at 1 billion (as of November 2009.)