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-. "March 11, 1988," Z.1 Financial Accounts of the United States (1988-03-11) : 25-25. https://fraser.stlouisfed.org/title/93/item/69079/toc/483873 , accessed on April 23, 2024.