It is a fact that Islam is growing rapidly in the West. In the U.S. alone the number of Muslims has risen dramatically, from about 10,000 in 1900 to 3 million or more in 1991 (some authorities say 4.5 million). Most of this growth is due to recent immigration and the high birth rate of Muslims (5 children per family on average), rather than to conversion. Still, the number of those who convert to Islam is significant. In the U.S., the majority are African-American (a third of all Muslims according to most authorities), but there have also been significant numbers of Anglos to convert as well, many of them well-educated.