In the last 20 years there has also been rapid growth in the share of Americans who identify as atheists, agnostics or no religion in particular. To some extent, this seems to be a phenomenon in which people with low levels of religious commitment are now more likely to identify as religiously unaffiliated, whereas in earlier decades such people would have identified as Christian, Jewish or as part of some other religious group.Hackett also notes that 14 percent of self-identified atheists say they believe in God, and 27 percent of those with no religious affiliation say they sometimes attend religious services.
May 15, 2015
"Nones" used to be nominal
Conrad Hackett, the religion demographer for Pew, on the rise of the religiously unaffiliated: