JOHANNESBURG (AFP): Fast-paced African countries may have growth rates that are the envy of developed economies, but the continent's boom has failed in recent years to significantly dent poverty levels, economists say. Sub-Saharan Africa is set to grow by 5.6pc this year, according to figures from  IMF, with 18 countries hitting at least 6pc. "Sub-Saharan Africa is expected to continue growing at a strong pace during 2013-14, with both resource-rich and lower-income economies benefiting from robust domestic demand," the IMF said.