Another study of wealthy households in 2005 found average yearly donations of $40,746 from people with incomes from $200,000 per year to $500,000 per year, Rooney says. But like most statistics on giving, those numbers are skewed upwards by a small number of people who give large amounts to charity, says Rooney, formerly the center's research director.
Other vice presidents have been criticized over their charitable contributions.
Then-Vice President Al Gore came under fire when his 1997 tax return showed only $353 in donations to charity; he and his wife, Tipper, gave $15,000 to charity, or nearly 7% of their income, in each of the following two years.
When Vice President Dick Cheney was campaigning in 2000, he defended his family's charitable donations of $209,832, or about 1%, of the $20.6 million he earned from 1989 to 1999. "It's a private matter … a matter of private choice," Cheney said in 2000. Last year, Cheney and his wife, Lynne Cheney, donated more than $166,000 to charity, or about 5.5% of their income, according to the Chronicle of Philanthropy.
Obama and his wife, Michelle, released tax returns earlier this year showing they earned more than $4.2 million last year, about $4 million of it from sales of Obama's two books, Dreams from My Father and The Audacity of Hope.
The Obamas gave more than $240,000 to charity last year, about 5.7% of their income, their tax return shows. Their charitable giving has risen with their income; in 2000, when the couple made $240,726, they gave $2,350 to charity, about 1% of their income.
Republican presidential nominee John McCain reported income of $405,409 last year. His wife, Cindy McCain, the head of a Phoenix beer distributorship, files separate tax returns. McCain's campaign released only a summary of one of Cindy McCain's tax returns, showing she earned more than $6 million in 2006.
John McCain reported giving more than $202,000 — a quarter of his income — to charity in 2006 and 2007, the only years for which his campaign released his tax returns. His campaign didn't release information about his wife's charitable contributions, however. In 2006, her total itemized tax deductions, a category which includes charitable contributions and other deductible items such as mortgage interest, was $569,737, or 9.3% of her income.
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