Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: G17084
For more information about this series, please see http://www.bea.gov/national/."
U.S. Bureau of Economic Analysis, Government subsidies: Economic affairs: Transportation [G170841A027NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/G170841A027NBEA, March 17, 2018.