Board of Governors of the Federal Reserve System (U.S.), 1935-. "Insurance and Pension Fund Reserves, Seasonally Adjusted Annual Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935-. "September 25, 1987 : Annual Revisions," Z.1 Financial Accounts of the United States (1987-09-25) : 42-42. https://fraser.stlouisfed.org/title/93/item/69087/toc/483591 , accessed on April 20, 2024.