Tax stats are available here:
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I downloaded 2009 data: <
I calculated donations as total contributions/Total income
1 to 1.5 million = 2.9%
1.5 to 2 million = 2.9%
2 to 5 million = 3.1%
5 to 10 million = 3.8%
10 million+ = 5.8%
There are 230,000+ people in these combined brackets.
So, according to the IRS, they do not. **However the _IRS restricts the number of donations that can be claimed_ , so this could be drastically under reporting.** The brackets all give around the same amount, with the middle class generally giving the least.