SEATTLE Mark Zuckerberg and his wife, Priscilla Chan, were the most generous American philanthropists in 2013, with a donation of 18 million shares of Facebook stock, valued at more than $970 million, to a Silicon Valley non profit in December.

The Chronicle of Philanthropy reported Monday that Zuckerberg’s donation was the largest charitable gift on the public record in 2013 and put the young couple at aOlernKienOP air jordan spizike bordeaux 2012 Giving new life to old Crocs the air jordan 9 olive black varsity red light olive top of aOlernKienOP air jordan 1 retro hare light silver white true red Nike Shoes the magazine’s aOlernKienOP air jordan 9 ix retro white black Macy’s Management Discusses Q1 2013 Resul annual list of 50 most generous Americans in 2013.

The Chronicle’s editor says the most significant fact from the list was the amount of money coming aOlernKienOP air jordan 14 xiv retro light graphite mid navy Packing Prescription Medica from living donors, which totalled about the same amount as the two previous years combined.

“It’s a sure sign that the economy is getting better and people are getting a lot less cautious,” said Stacy Palmer, Chronicle editor.

Some of the nation’s biggest givers do not appear on the 2013 list, not because they stopped being generous, but because their donations in 2013 were counted as pledges air jordan 13 infrared black infrared 23 black in previous years.

For example, Microsoft co founder Bill Gates and his wife, Melinda, gave their foundation slightly more than $181.3 million last year, but they were paying off a pledge air jordan 2 ii retro qf candy pack classic green black white of about $3.3 billion they made in 2004. CNN founder Ted Turner and Berkshire Hathaway chairman Warren Buffett also made large gifts toward air jordan 1 retro high strap black red previous pledges.

It took gifts air jordan 13 premium 3m reflective totalling at least $37.5 million to make the list this year. Forty Air Jordan 14s two of the top 50 made gifts of $50 million or more.

Thirty made big gifts to colleges and universities, but Palmer noted most college gifts went to science and research this year, not to buildings, as aOlernKienOP air jordan 11 retro low infrared 23 The Wallabee Articles in previous years.

Ten aOlernKienOP air jordan 3 iii retro 2001 black cement grey What Are the Treatments for P of the 50 made the list because of bequests after their deaths, including the second biggest giver in 2013, George Mitchell, a Galveston, Texas, man who made his fortune in energy and real estate.

At No. 3 were Nike chairman Philip Knight and his wife, Penelope, of Portland, Ore., who made a $500 million challenge grant to Oregon Health Science University Foundation for cancer research. The Knight pledge requires the university match it within the next two years.

No. 4 was aOlernKienOP air jordan 14 retro white black red Real Estate in Longport NJ Premier Prop philanthropist and former New York mayor Michael Bloomberg, who made gifts totalling $452 million in 2013 to arts, education, environment, public health and other causes.

Nineteen people or couples on the list have signed the Giving Pledge, started by Bill Gates and air jordan fusion 4 Warren Buffett in 2010. More than 120 of the world’s wealthiest individuals and families have pledged to give at least half aOlernKienOP air jordan 2 ii retro qf candy pack varsity red black white somethings You their air jordan retro 14 thunder black vibrant yellow white wealth to charity since the movement began.

Although most people on the list were prominent wealthy people who have given generously air jordan spizike stealth black in air jordan 5 v retro 3 4 high men laney white varsity royal varsity maize the past, Palmer said a few were aOlernKienOP air jordan 6 7 gold medal pack The End of the SS Canberra surprises, including Jack MacDonald, a Seattle lawyer, who gave $139 million to aOlernKienOP air jordan 3 retro wolf grey Top 5 Tips For Buying Lingerie three nonprofits upon his death.