ACCORDING TO A FAMOUS NON MUSLIM WEBSITE (religioustolerance.org/worldrel.htm)

ISLAM IS THE ONLY GROWING RELIGION WHILE OTHERS ARE DROPPING.

Religions of the world: numbers of adherents; growth rates

Christianity ~ 2,039 millions ~ 32% (dropping)
ISLAM ~ 1,570 millions ~ 22% (growing)
Hinduism ~ 950millions ~ 13% (stable)
No religion ~ 775millions ~ 12% (dropping)
Buddhism ~ 350millions ~ 6% (stable?)
Atheism ~ 150 millions ~ 2% (no info)
Judaism (jews) ~ 14.5 millions ~

Photo Credit: Grafik Islam