Dates represent the end of the fiscal year. Fiscal year series are updated with official OMB figures in January or February. In October, the latest fiscal year is updated with figures from the Treasury Department (September figures from the Treasury's fiscal year to date series).

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

BEA Account Code: M318461 For more information about this series, please see http://www.bea.gov/national/.

BEA Account Code: M318231 For more information about this series, please see http://www.bea.gov/national/.