Ah! A nice coincidence is that Seychelles is Africa's most prosperous country, adding $904 per year per capita to national wealth measured - by the World Bank - using a methodology sensitive to resource depletion, investment in education, and pollution externalities. In contrast, capitalist South Africa (where I live) loses $2 per person each year in genuine wealth, and oil-rich Gabon loses $2241 per person each year. Sorry, the relevant formatting is messed up but here's the table:
African countries' adjusted national wealth and 'savings gaps', 2000
Income per capita ($)Population growth rate (%)Adjusted net saving per capita ($)Change in wealth per capita ($)Saving gap % GNI Benin3602.614-4211.5 Botswana29251.71021814n.a. Burkina Faso2302.515-3615.8 Burundi971.9-10-3737.7 Cameroon5482.2-8-15227.7 CapeVerde11952.743-816.8 Chad1743.1-8-7442.6 Comoros3672.5-17-7319.9 Rep of Congo6603.2-227-727110.2 Côte d'Ivoire6252.3-5-10016.0 Ethiopia1012.4-4-2727.1 Gabon33702.3-1183-224166.5 The Gambia3053.4-5-4514.6 Ghana2551.716-187.2 Kenya3432.340-113.2 Madagascar2453.19-5622.7 Malawi1622.1-2-2918.2 Mali2212.420-4721.2 Mauritania3822.9-30-14738.4 Mauritius36971.1645514n.a. Mozambique1952.215-2010.0 Namibia18203.2392140n.a. Niger1663.3-10-8350.3 Nigeria2972.4-97-21070.6 Rwanda2332.914-6026.0 Senegal4492.631-276.1 Seychelles70890.91162904n.a. South Africa28372.5246-20.1 Swaziland13752.51298n.a. Togo2854.0-20-8830.8 Zambia3122.0-13-6320.4 Zimbabwe5502.053-40.7
Source: World Bank, Where is the Wealth of Nations?, p.66.