Source: U.S. Office of Management and Budget  

Source: Federal Reserve Bank of St. Louis  

Release: Debt to Gross Domestic Product Ratios

Units:  Percent of GDP, Not Seasonally Adjusted

Frequency:  Annual

Federal Outlays: Interest as Percent of Gross Domestic Product (FYOIGDA188S) was first constructed by the Federal Reserve Bank of St. Louis in January 2013. It is calculated using Federal Outlays: Interest (FYOINT) and Gross Domestic Product (GDPA):
FYOIGDA188S = ((FYOINT/1000)/GDPA)*100
FYOINT/1000 transforms FYOINT from millions of dollars to billions of dollars.