The per capita income series are derived by Haver Analytics using quarterly population interpolated from midyear population estimates. Copyright, 2016, Haver Analytics. Reprinted with permission.
Please visit http://research.stlouisfed.org/fred2/personalincome for documentation on the derivation of personal income.
Due to the historical revision applied to data, the historical values prior January 2001 have been eliminated from the series. These data values are expected to return sometime in 2014.
Source: US. Bureau of Economic Analysis
Release: State Personal Income (Quarterly)
US. Bureau of Economic Analysis, Real Per Capita Personal Income in Illinois© [ILOI96], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/ILOI96, May 1, 2016.