According to a September 2, 2015 Pew Research survey, about 45% of Americans declare themselves to have a Catholic “connection.” Of these, just 20% practice their faith, 9% view themselves as “cultural Catholics,” 9% declare themselves to be “ex Catholics,” while the balance tell researchers they have an “other” connection.
For all Christians, the tipping point for “falling away from their faith” often occurs in young adulthood—especially as they head toward universities. At PJ Media, Tyler O’Neil has written an excellent article entitled: How to Keep Your Kids from Rejecting God over Evolution in College.
It is well worth your read.