Interesting factoid, but believable. The road of Catholicism isn't very wide or tractable. It IS the "straight and narrow." But, then we weren't promised anything different in this earthly life, were we?
As for your "most Catholics use birth control" statement, that sounds like something from a mainstream media byte, unreliable but MOST desirable to be believed. It was probably from one of many of those "interviews" that is also MOST desirable to be believed.
However, any first-year statistics student will tell you ALL about the unreliability of the "interview method," that is, THE most unreliable method of gleaning knowledge information.
FReegards.
A comment I have repeatedly heard is that 98% of Catholic women use birth control at some time in their life. I have looked at possible statistics, and found this link which uses lower figures and compares them with Evangelicals, and mainline Protestants. There are relatively minor differences in total usage.
http://www.livescience.com/13708-catholics-contraceptives.html