By Theordoric Meyer  ProPublica 

With the documents MittRomney released recently, we know a bit more about his taxes.

We know, for instance, that Romney paid a rate of 14.1 percent on $13.7 million in income on his 2011 tax return, which he achieved by purposely overpaying. Though he was entitled to deduct $4 million in charitable contributions, Romney deducted only $2.25 million to keep his tax rate above 13 percent.