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-Philadelphia District includes all of Delaware, eastern Pennsylvania, and southern New Jersey.
Source: US. Bureau of the Census
US. Bureau of the Census, Resident Population in FRB-Philadelphia District [D3POP], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/D3POP/, October 13, 2015.