Where can I find statistics on the Producer Price Index?
U.S. Department of Labor: Producer Price Indexes. For the most recent PPI, look down the page for the most recent news release. For historical data back to 1994, scroll down to Archived PPI News Releases.
For historical PPI 1947-1998, go to Historical Statistics of the United States. Once in, select Economic Structure & Performance from the Table of Contents, then Prices, then Wholesale Producer Price Indexes.