Searched for Religious affiliation shift and got Pew Study!!!
See why people are leaving their childhood superstition. Whether or not they re-affiliate; whether they choose a different superstition to affiliate with or just go about their lives AND even shows those who are childhood unaffiliated who later choose a superstition to affiliate and what is the reason for becoming affiliated with a superstition.
[Hint...the reason for an unaffiliated person to become affiliated is IMO for sex...one of the guilty pleasures.]
The whole thing starts here
"Faith must have adequate evidence else it is mere superstition"...Alexander Hodge (1823-1886)
"A myth is a religion in which no one any longer believes"...James Feibleman (1904-1987)