U.S. Bureau of Labor Statistics, Producer Price Index by Industry: Fluid Milk Manufacturing: Fluid Milk, Lowfat, Including 2.0, 1.0, and 0.5 Percent Packaged, Excluding Ultra-High-Temperature and Flavored [PCU31151131151152], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PCU31151131151152, .