But most within this unaffiliated group — 55 percent — identified with a religious group when they were younger.
“These younger unaffiliated adults are very nonreligious,” said Daniel Cox, PRRI’s research director. “They demonstrate much lower levels of religiosity than we see in the general population,” including participation in religious rituals or worship services.
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via http://www.religionnews.com/faith/doctrine-and-practice/Young-Millennials-losing-faith-in-record-numbers