US Federal Debt as Percentage of GDP Chart
Current Debt Percent: 67.70%
Debt Percent for Dec 2011
Mean: 46.03%
Median: 41.55%
Min: 23.90% (Dec 1974)
Max: 108.70% (Dec 1946)

US Federal Debt held by the public.

Source: White House Office of Management and Budget, Federal Debt at the End of Year