The Future of World Religions: Population Growth Projections, 2010-2050 The World Factbook gives the population as7,095,217,980 (July 2013 est.) and the distribution of religions as Christian 31.50% (of which Roman Catholic 16.85%, Protestant 6.15%, Orthodox 3.96%, Anglican 1.26%), Muslim 23.20% (of which Sunni 75-90%, Shia 10-20%, Ahmadi 1%), Hindu 13.8%, Buddhist 6.77%,