A study published on April 15 by the Pew Forum on Religion & Public Life has found that the number of Christians in sub-Saharan Africa grew from seven million in 1900 to 470 million today. During the same time period, the number of Muslims grew from 11 million to 234 million.
In 1900, 76% of the population of sub-Saharan Africa practiced indigenous religions, while 14% were Muslim and 9% were Christian. Today, 57% of the population is Christian, while 29% are Muslim and 13% practice indigenous religions.
Put that one in your hookah and smoke it. =)