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-San Francisco District includes all of Alaska, Arizona, California, Hawaii, Idaho, Nevada, Oregon, Utah, and Washington.
Source: US. Bureau of the Census
US. Bureau of the Census, Resident Population in FRB-San Francisco District [D12POP], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/D12POP/, October 4, 2015.