The United States Bullion Depository holds 4,578 metric tons (5,046.3 short tons) of gold bullion (147.2 million oz. troy).[2] This is roughly 3 percent of all the gold ever refined throughout human history. Even so, the depository is second in the United States to the Federal Reserve Bank of New York's underground vault in Manhattan, which holds 7,000 metric tons (7,716 tons) of gold bullion (225.1 million oz. troy), some of it in trust for foreign nations, central banks and official international organizations.
http://en.wikipedia.org/wiki/United_...ion_Depository
Depends on who you trust for the answer I suppose...