Source: U.S. Bureau of Economic Analysis
Real Manufacturing and Trade Industries Sales is used in the calculation of CQRMTSPL (https://fred.stlouisfed.org/series/CQRMTSPL). This series is based on the North American Industry Classification System (NAICS), which replaced the Standard Industrial Classification (SIC) system. The SIC is no longer published with this release, and the SIC series is HQRMT (https://fred.stlouisfed.org/series/HQRMT).
U.S. Bureau of Economic Analysis, Real Manufacturing and Trade Industries Sales [CQRMT], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CQRMT, March 30, 2017.