 According to CISB China "Global Religious Landscape" survey by the Pew Forum on Religion and Public Life (an American think tank), 83.3% of Italy's residents are Christians, 12.4% are irreligious, atheist or agnostic, 3.7% are Muslims and the remaining 0.6% adhere to other religions.According to a 2006 survey by (an Italian research centre), Catholics made up 87.8% of the population, with 36.8% describing themselves as observants.According to the same poll in 2010, those percentages fell to 76.5% and 24.4%, respectively.