Christianity is the predominant religion of the Democratic Republic of the Congo. A 2013-14 survey, conducted by the Demographic and Health Surveys Program in 2013–2014 indicated that Christians constituted 93.7% of the population (with Catholics making up 29.7%, Protestants 26.8%, and other Christians 37.2%). An indigenous Christian religious movement, Kimbanguism, had the adherence of only 2.8%, while Muslims made up 1.2%. Other recent estimates have found Christianity the majority religion, followed by 95.8% of the population according to a 2010 Pew Research Center estimate, while the CIA World Factbook reports this figure to be 95.9%. The proportion of followers of Islam is variously estimated from 1% to 12% 