Prison population and religion

Seventy five percent of Americans are God-fearing Christians.
Seventy five percent of prisoners are God-fearing Christians.
Ten percent of Americans are atheists
0.2% of prisoners are atheists
Something is truly wrong here. And I don’t mean numbers.
I saw these figures in a Ricky Gervais column. Do you know the source of these figures?
Yep, that’s where I got them from. I don’t know where he got his from but it’s all over the place. Some figures are more conservative while some are more, should we say “relaxed”, but I figured his are kind of i the middle so I put ‘em up on here.
Yes, a quick search for the original source of these figures is hindered by how many people reposted them from the Gervais article. I’ll wait for someone else to do the work and repost the original documents, because that is a very interesting result.
You also have to keep in mind that lot of people find “God” while in prison.