Producer Price Index by Commodity: Intermediate Demand by Production Flow: Inputs to Stage 4 Services Producers, Services Less Trade, Transportation, and Warehousing (WPSID54221)

U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Intermediate Demand by Production Flow: Inputs to Stage 4 Services Producers, Services Less Trade, Transportation, and Warehousing [WPSID54221], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPSID54221, .