Release: Treasury Bulletin
U.S. Department of the Treasury. Fiscal Service, Federal Debt: Total Public Debt [GFDEBTN], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/GFDEBTN, January 23, 2018.
Release: Economic Report of the President
Dates represent the end of the fiscal year.
Council of Economic Advisers (US), Gross Federal Debt [FYGFD], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/FYGFD, January 23, 2018.