gold, page-48405

The total US gold holdings are 8965 tonnes, of which 4,581 tonnes are stored at Fort Knox. The 147.3 million at Fort Knox ounces is currently worth $194 billion.

"As of September 2018, U.S. holdings are 8,965 metric tons (261.5 million oz. troy), with a market value of over $310.5 billion. In contrast, the GDP of the United States was $19.4 trillion as of April 2017."

https://en.wikipedia.org/wiki/United_States_Bullion_Depository