U.S. Census Bureau,

U.S. Census Bureau,

Current Population Reports, P25-1095;

“Table US-EST90INT-04 – Intercensal Estimates of the United States Resident Population

by Age Groups and Sex, 1990-2000: Selected Months”;

published September 13, 2002;

< http://www.census.gov/popest/archives/EST90INTERCENSAL/US-EST90INT-04.html >; and

“Table 1: Annual Estimates of the Population by Five-Year Age Groups and Sex for the

United States: April 1, 2000 to July 1, 2006”

Release date: May 17, 2007

< http://www.census.gov/popest/national/asrh/NC-EST2006/NC-EST2006-01.xls >.

referenced on dataset section Data (#1)