This of course has to rely on official stats being accurate.
Example in Britain the number of muslims 30 years ago, in the Saudi press, stated to be one million.
After years of mass immigration into the UK high birth rates among the muslim community, wives imported from Pakistan together with her close relatives, add to this Somalians.North Africans, Iraqies. Algerians etc etc etc.
The stats are laughable, London Birmingham Bradford Leeds etc no longer represent any part of the UK.
Pressure is already been placed on politicians and Church leaders to accept Sharia with lightly veiled threats.
Sweden at the moment, with gun battles on the street and cars being torched schools and Churches trashed, Malmo seems to many, that it will be the first to fall to islam.
Danes are under attack also, the Greenlanders of Denmark are being driven from their homes.
Germany is no better, it's Turks mainly causing the trouble.
France it's annual, especially during ramadan where hundreds of cars will be torched!
Western politicians appear to have given up on their own populations!
European cities on the outer rims, are islamic and nothing whatsoever to do with, which nation they have moved into.