religious global landscape changing pew population world asia size groups believe unaffiliated
religious global landscape christians largest changing group population world pew research center projections 2060 sites
global religious landscape changing birth population change muslim religion christian groups christianity pew percent world christians muslims rates 2060 islam
religious global landscape changing fertility rates age groups pew addition distributions switching
religious religion global decline population landscape world changing people than nones there unaffiliated projected share religiously pew majority deaths asia
religious changing global landscape births deaths regional level patterns country pew populations
religious global landscape changing christian number christians pew america around
religious christians religion landscape changing global countries birth muslims births deaths world among christian 2010 pew than rate europe research