Board of Governors of the Federal Reserve System (U.S.), 1935-. "U.S. Government, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "February 17, 1981," Z.1 Financial Accounts of the United States (1981-02-17) : 23-23. https://fraser.stlouisfed.org/title/93/item/69064/toc/480653 , accessed on April 25, 2024.