With more than 90 percent of the region's population saying faith is "very important" in their lives, it's also on one of the major fault lines of religious conflict.

Northern Africa is heavily Muslim and southern Africa is mostly Christian but where the two religions meet in a 4,000-mile belt from Somalia to Senegal has often turned violent, especially in Nigeria, where hundreds of Muslims and Christians have died since January fighting each other.

At least 45 percent of the Christians surveyed in Ghana, Zambia, Mozambique, Cameroon, Kenya, Uganda and Chad - which topped the list at 70 percent - consider Muslims to be violent. Far smaller percentages of Muslims see Christians as violent - Djibouti had the largest percentage at 40 percent, followed by Kenya and Uganda in the low 30s.

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