In 2008, the American Religious Identification Survey (ARIS) reported:
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{{cquote|The 1990s was the decade when the “secular boom” occurred – each year 1.3 million more adult Americans joined the ranks of the Nones. Since 2001 the annual increase has halved to 660,000 a year...
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Regarding belief in the divine, most Nones are neither [[atheism|atheists]] nor [[theism|theists]] but rather [[agnosticism|agnostics]] and [[deism|deists]] (59%) and perhaps best described as [[Philosophical skepticism|skeptics]].<ref>[http://commons.trincoll.edu/aris/2009/09/22/american_nones_the_profile_of_the_no_religion_population/ Press: Americans Who Don’t Identify with a Religion No Longer a Fringe Group]</ref>}}