Regional Price Parities: All Items: Metropolitan Portion for Illinois was 102.89300 Index in January of 2022, according to the United States Federal Reserve. Historically, Regional Price Parities: All Items: Metropolitan Portion for Illinois reached a record high of 104.13200 in January of 2011 and a record low of 100.68000 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for Regional Price Parities: All Items: Metropolitan Portion for Illinois - last updated from the United States Federal Reserve on March of 2024.