unaffiliated religiously secular
religiously unaffiliated growth years prri 1991 survey sources social general
retention religious then now rates americans unaffiliated religion methodist prri united insight gotw church
number religiously unaffiliated 2050 future people million double projects report muslims hardly changes difference those when but make
religion religionnews stop prri believing subgroups religiously unaffiliated
christians religion attitudes muslims pew raised religiously unaffiliated neighbors accepting countries christianity pewresearch europeans identity