Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: B3040C
For more information about this series, please see http://www.bea.gov/national/."
U.S. Bureau of Economic Analysis, Corporate profits before tax: Domestic industries: Transportation: Trucking and warehousing [B3040C0A144NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/B3040C0A144NBEA, March 25, 2018.