All observations are July 1 estimates of each year.
This series is calculated by FRB-St. Louis using data series from the Census Bureau. The FRB-St. Louis District includes all of Arkansas and portions of six other states: Missouri, Mississippi, Tennessee, Kentucky, Indiana and Illinois.
Source: US. Bureau of the Census
US. Bureau of the Census, Resident Population for all Indiana counties in FRB-St. Louis District [DINPOP], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/DINPOP/, October 9, 2015.