One-quarter of all adult Americans under age 30 (25%) are not affiliated with any particular religion, which is more than three times the number of unaffiliated adults who are age 70 and older (8%). Overall, younger Americans tend to be considerably less Protestant and far less religiously affiliated than older Americans.

The Daily Number is a statistic, updated every weekday and typically drawn from Pew Research Center project findings, that highlights an important trend.

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