Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Wired Telephone Services (WPU371)

U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Wired Telephone Services [WPU371], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPU371, February 3, 2023.