United States. Bureau of Economic Analysis. "Gross Domestic Product (Third Estimate), Corporate Profits, and GDP by Industry, Fourth Quarter and Year 2021 : Effects of Selected Federal Pandemic Response Programs on Federal Government Receipts, Expenditures, and Saving, 2021Q4 Third, BEA 22-13," Bureau of Economic Analysis (BEA) News Releases (March 30, 2022). https://fraser.stlouisfed.org/title/6148/item/611770/content/pdf/bea_newsreleases_20220330_effects-gov-4thQ3rd, accessed on March 20, 2025.