Owing to labour migration in the 1960s and several waves of political refugees since the 1970s, Islam has become a visible religion in Germany. As of 2009, there are 4.3 million Muslims (5.4% of the population). Of these, 1.9 million are German citizens (2.4%).[1] As of 2006, about 15,000 converts are of German ancestry.[2]

(c)http://en.wikipedia.org/wiki/Islam_in_Germany
(на понятном языке вам)