For the second year in a row, former New York City mayor Michael Bloomberg gave the most to charitable causes, according to the Chronicle of Philanthropy’s exclusive Philanthropy 50 list of the Americans who donated the largest sums to nonprofits last year.

Michael Bloomberg, the former New York City mayor, gave the most to charitable causes last year, followed by Nike co-founder Phil Knight and his wife, Penny, and Michael Dell and his wife, Susan, according to the Chronicle of Philanthropy’s exclusive list of the 50 Americans who donated the largest sums to nonprofits last year.