Wealthiest Donors Gave 9 Percent of Their Income in 2007, Study Finds

* While giving online became more common from 2005 to 2007, it did not catch on in a big way with affluent people. Sixteen percent of wealthy people gave online in 2007, a 1-percent increase over 2005. Nearly ninety-three percent of people in the study gave via cash and check, by far the the most common way to donate.