The African Development Bank Group [to 6 June 2015]
http://www.afdb.org/en/news-and-events/press-releases/

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African Development Bank unveils first-ever study of female board membership in Africa
03/06/2015 – Africa may stack up pretty well compared with the world’s regions on having companies with female board members, but the continent has a distance to go to make sure its strong economic growth includes its most talented women at the top, according to the first-ever study of female board membership in Africa, unveiled during the World Economic Forum Africa, by the African Development Bank, commissioner of the study