Pew Research has found that 20% of the U.S.

North Wildwood - Pew Research has found that 20% of the U.S. population identifies as Catholic, but only about 3 in 10 of them say they attend mass regularly. Opinions about abortion rights appear to be related to how often someone worships — just 34% of Catholics who attend mass weekly say abortion should be legal in all or most cases, whereas that number jumps to 68% among those who attend mass monthly or less.