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https://www.pewforum.org/2021/12/14/about-three-in-ten-u-s-adults-are-now-religiously-unaffiliated/
About Three-in-Ten U.S. Adults Are Now Religiously Unaffiliated
Self-identified Christians make up 63% of the U.S. population in 2021, down from 75% a decade ago.
www.pewforum.org
미국 종교 조사.
예전 어떤 조사에선 50% 미만이라고 본 것도 같은 데, 아직 개신교 숫자가 많네.