From 1961 to 2015 (http://www.worldeconomics.com/papers/Global%20Growth%20Monit...), real GDP per capita in Africa grew by 1.1% annually (!), compared to 3.9% for Asia, 1.7% for the Americas, and 2.2% for Europe. Growth from 2001 to 2010 of 2.9% is included in that figure; it was the first decade in that period in which Africa outgrew any other continent.
GDP per capita in US 1990 dollars (http://www.worldeconomics.com/Data/MadisonHistoricalGDP/Madi...) for several African countries:
Country | 1980 | 2008
-------------|------|------
Algeria | 3152 | 3520
Botswana | 1765 | 4769
Cameroon | 1192 | 1212
Gabon | 6777 | 3811
Ivory Coast | 2041 | 1095
Kenya | 1051 | 1098
Liberia | 1162 | 802
Madagacar | 1054 | 730
Malawi | 630 | 744
Mauritius | 4367 | 14529
Niger | 810 | 514
Nigeria | 1305 | 1524
Seychelles | 4444 | 6109
South Africa | 4390 | 4793
Zimbabwe | 1295 | 779
For every Mauritius, Botswana, and Seychelles there is a Zimbabwe, Niger, and Ivory Coast.