US Census Statistics 2009

People QuickFacts USA

Population, 2009 estimate 307,006,550

Population, percent change, April 1, 2000 to July 1, 2009 9.1%

Population estimates base (April 1) 2000 281,424,602

Persons under 5 years old, percent, 2009 6.9%

Persons under 18 years old, percent, 2009 24.3%

Persons 65 years old and over, percent, 2009 12.9%

Female persons, percent, 2009 50.7%
http://quickfacts.census.gov/qfd/states/00000.html