[WEF]Abuja -The African economic success story is by now a well-reported fact. More than half of the world's 10 fastest-growing economies are in Africa, and the continent's economy is projected to grow more than 5% this year. In sub-Saharan Africa overall, the annual economic growth rate for more than a decade has surpassed that of far wealthier countries that comprise the Organization for Economic Cooperation and Development....