The Economy of Nigeria is a middle-income, mixed economy and emerging market, with expanding manufacturing, financial, service, communications, technology, and entertainment sectors. It is ranked as the 27th-largest economy in the world in terms of nominal GDP, and the 24th-largest in terms of purchasing power parity and the largest Sub Saharan Africa’s According to a Citigroup report published in February 2011, Nigeria would have the highest average GDP growth in the world between 2010 and 2050. Nigeria is one of two countries from Africa among the 11 Global Growth Generators countries.