Regional Price Parities: All Items: Nonmetropolitan Portion for Illinois was 86.58100 Index in January of 2022, according to the United States Federal Reserve. Historically, Regional Price Parities: All Items: Nonmetropolitan Portion for Illinois reached a record high of 88.53700 in January of 2019 and a record low of 81.37200 in January of 2008. Trading Economics provides the current actual value, an historical data chart and related indicators for Regional Price Parities: All Items: Nonmetropolitan Portion for Illinois - last updated from the United States Federal Reserve on April of 2024.