United States. Bureau of Economic Analysis. "Broad Growth Across States in 2014 : Advance 2014 and Revised 1997-2013 Statistics of GDP by State, BEA 15-25," Bureau of Economic Analysis (BEA) News Releases (June 10, 2015). https://fraser.stlouisfed.org/title/6148/item/602243, accessed on March 24, 2025.