It is widely thought that Catholics are terrible in retaining members, and that Catholics are leaving the Church in droves. But while our overall number of drifters and those who have departed is large, our actual rate of retention ranks significantly higher than any Protestant denomination.
What is even more interesting, is that Atheists have the lowest retention rates of all 'religious groups', according to recent statistics. To quote the CARA blog: "And if you think it is challenging to be a Catholic parent, try being an Atheist parent! Some 70% of Americans raised to believe God does not exist end up being a member of a religion as an adult". Visit this article from the Archdiocese of Washington website to read more.