U.S. Census Bureau,
1990 Census of Population and Housing, Population and Housing Unit
Counts (CPH-2);
Current Population Reports, P25-1106;
“Table CO-EST2001-12-00 – Time Series of Intercensal State Populaton Estimates: April 1, 1990 to April 1, 2000”;
published 11 April 2002;
< http://www.census.gov/popest/archives/2000s/vintage_2001/CO-EST2001-12/CO-EST2001-12-00.html >; and
“Table 1: Annual Estimates of the Population for the United States, Regions, and States, and for Puerto Rico: April 1, 2000 to July 1, 2006 (NST-EST2006-01)”
published 22 December 2006;
< http://www.census.gov/popest/states/NST-ann-est.html >.
For more information:
http://www.census.gov/popest/estimates.php
referenced on dataset section Notes (#2)
