This is from a Site Called "Atheist Republic" :
" The phenomenon of "nones" — individuals who claim no religious affiliation — is rapidly reshaping America's religious landscape. Recent surveys by The Associated Press-NORC Center for Public Affairs Research indicate that 30% of U.S. adults identify as nonreligious. This group, which has seen a steady increase over the past three decades, includes atheists, agnostics, and those who label themselves as "nothing in particular". Interestingly, while atheists and agnostics each make up 7% of U.S. adults, "nothings in particular" constitute about 1 in 6 or roughly 17%. Ryan Burge, a political science professor, underscores the significance of this trend by stating, “the most important story without a shadow of a doubt is the unbelievable rise in the share of Americans who are nonreligious.” Notably, young adults show the highest representation in this category, with nearly 40% of those under 30 identifying as nones. "