United States. Bureau of Economic Analysis. "U.S. International Trade in Goods and Services, January 2022 : Highlights (Annual): 2021 Trade Gap is $861.4 Billion, BEA 22-08, CB 22-35," Bureau of Economic Analysis (BEA) News Releases (March 8, 2022). https://fraser.stlouisfed.org/title/6148/item/611571/content/pdf/bea_newsreleases_20220308_highlights-annual, accessed on March 21, 2025.