Roughly six in ten U.S. households contribute to charity routinely, according Indiana University’s Center on Philanthropy Panel Study. The ongoing survey asked the same 8,000 families about their charitable gifts made in '00, '02 and '04. While the total percentage of gifting households was similar in all three years (67% to 69%), it was not always the same households. The study found that nearly one third of gifting households shift between donating and not donating. (The NonProfit Times 1/14/08)