In 2007, 78.4% of Americans were Christian, in 2014, only 70.6%.

According to the Pew's new U.S. Religious Landscape Study.

The decline appears largely in the mainline Protestant and Catholic segment of Christians, evangelicals having lost only one percentage point.

Those who name no religious affiliation have grown from 16.1% to 22.8% in this 7 year period. That segment is broken down into 3 groups: atheist, agnostic, and "nothing in particular." The "nothing in particular" people dominate. 15.8% of Americans affiliate with nothing religious, up from 12.1%. Atheists have broken through to 3.1%, up from 1.6%, but they're still trailing the agnostics, who've made it to 4.0%, up from 2.4%.

It's interesting to separate "nothing in particular" from agnostic. Is "nothing in particular" even more agnostic than agnostic? They don't even want to go out on a limb and say they don't know? Or (more likely) these are the people who feel they are spiritual or they believe in God in a way that doesn't lead them to join any organizations or they used to be something � such as mainline Protestant � but they lost the sense that membership in that group meant anything. So you can't add the nothings and the agnostics.

These "nothing in particular" people, at 15.8%, now outnumber the mainline Protestants, who are down to 14.7%, from 18.1%.

It's also interesting that Mormons � who might seem like a large and growing group � are only 1.6%, down from 1.7%. And how about Muslims? You hear so much about them, but they're only 0.9% (up from 0.4%). Buddhists hold steady at 0.7%. Hindus are up to 0.7%, from 0.3%. The biggest non-Christian religion is Judaism, and it's not declining. It's up to 1.9%, from 1.7%.

Much more at the link, including issues of age, race, region, and switching religions.