Catholic school enrollment today is about the same as 100 years ago.

That’s kind of funny given how many fewer people were in the United States back then.  What’s also kind of funny is that compared to a century ago, Catholic schools now need more than 2x the elementary teachers and more than 6x the secondary school teachers for very nearly the same number of children.  And this with roughly 20% fewer schools compared to 100 years ago.

From NCES tables on private school enrollment.