 The 2002 census was the first since 1933 which did not categorise Rwandan population into the three groups.The largest faith in Rwanda is Roman Catholicism, but there have been significant changes in the nation's religious demographics since the genocide, with many conversions to evangelical Christianity, and, to a lesser degree, Islam.According to the 2012 census, Roman Catholics represented 43.7% of the population, Protestants (excluding Seventh-day Adventists) 37.7%, Seventh-day Adventists 11.8%, and Muslims 2.0%; 0.2% claimed no religious beliefs and 1.3% did not state a religion.