There is an excellent article on the African Church in Christianity today. It’s well worth a read.
A century ago, there were four times as many African Muslims as there were Christians. Today, Christians constitute 46 percent of the total population, and now outnumber the continent’s estimated 412 million Muslims. Further, while African countries currently host nearly 96,000 foreign missionaries, more than 18,400 African missionaries serve abroad. Just how many African evangelists and missionaries are at work within their own countries is difficult to estimate. Let’s just say that evangelistic and church-related organizations might possibly be the continent’s No. 1 growth industry.