Jill Biden

This year, Joe and Jill Biden increased their charitable donations from 1.5 percent of their income to 1.87 percent.

"The Vice President and Dr. Jill Biden also released their 2012 federal income tax returns, as well as state income tax returns for both Delaware and Virginia. The Bidens filed joint federal and combined Delaware income tax returns. Dr. Biden filed a separate non-resident tax return for the state of Virginia. Together, they reported adjusted gross income of $385,072. The Bidens paid $87,851 in total federal tax for 2012. They paid $13,531 in Delaware income tax and $3,593 in Virginia income tax. The Bidens contributed $7,190 to charity in 2012," writes the White House, summarizing the Bidens' income tax return. 

That means the Bidens donated 1.87 percent of their income to charity.

Last year, as we reported, the number was 1.5 percent:

According to the White House, "Together, [the Bidens] reported adjusted gross income of $379,035. The Bidens paid $87,900 in total federal tax for 2011. They paid $13,843 in Delaware income tax and $3,614 in Virginia income tax. The Bidens contributed $5,540 to charity in 2011."

In other words, the Bidens donated less than 1.5 percent of their adjusted gross income to charity.  

The White House reveals that the Obamas were a bit more charitable.

"The President and First Lady also reported donating $150,034 – or about 24.6 percent of their adjusted gross income – to 33 different charities. The largest reported gift to charity was $103,871 to the Fisher House Foundation," writes the White House.