The number of billionaires in Africa--and the size of their fortunes--continues to drop. On this year's list, FORBES is only including African billionaires living in Africa, instead of featuring Africa's 50 richest people. There are 21 billionaires on this year’s list, worth a combined $70 billion. On the November 2015 Africa Rich List, there were 23 African billionaires worth a combined $79.8 billion. That in turn was down from 28 African billionaires in 2014.