One of the more interesting findings of the new Trinity ARIS study of the Nones is that those who grew up with no religion (i.e. were Nones at the age of 12) are just as likely to switch to a religion in later life as those with a religion are to switch to something else. Or to put it another way, the Nones have the same retention rate–41 percent–as, on average, all other American religious groups.

So even as the proportion of those who say they have no religion has doubled over the past two decades, Nones constitute a normal American “denomination”–filled with people coming in and coming out.