The World Bank has just published its Human Capital Index, which is seen as a new way of measuring economic success and gauges how much effort is being put into developing the youth.

The higher the investment in education and health the more productive and higher earning the workforce tends to be, the World Bank says.African countries dominate the bottom of the index.

Chad is the lowest rank country and 21 of the bottom 25 countries are in Africa including:

152nd - Nigeria

137th - Uganda

135th - Ethiopia

Kenya is ranked 94th and top-ranked African country is Seychelles at 43rd.