Here's some more data from Regnerus and Uecker's 2006 study (see yesterday's post for citation & description).
This chart addresses how many kids have a big drop in religiousness each year from 13 to 18. So, the biggest drop happens at age 18, when 9.3% of the kids stopped going to church nearly as much.
The authors make an interesting observation that age 18 is the year that the most kids get into religion and the most get out.
Why do you think that is?