United States. Bureau of Economic Analysis. "Gross Domestic Product, Fourth Quarter and Year 2021 (Advance Estimate) : Highlights: Gross Domestic Product, Fourth Quarter and Year 2021 (Advance Estimate), BEA 22-02," Bureau of Economic Analysis (BEA) News Releases (January 27, 2022). https://fraser.stlouisfed.org/title/6148/item/610851/content/pdf/bea_newsreleases_20220127_highlights, accessed on March 21, 2025.