United States Census Bureau. 2010 US Census of Population and Housing: Demographic Profiles: Table DPSF1 - Total Population by Age and Sex | State: Washington | Demographic Indicator*: Total Population 40 to 44 years, 2010. Data-Planet™ Statistical Datasets by Conquest Systems, Inc. Dataset-ID: 001-044-002
Dataset: Reports a count of the United States population at the national (including Washington, DC, and Puerto Rico), state, and county level, by (5-year) age group and sex.
The United States Census of Population and Housing counts every resident in the United States every 10 years, as mandated by Article I, Section 2 of the Constitution. The data collected by the decennial census are used to determine the number of seats each state has in the US House of Representatives and to allocate federal funds to local communities. The Demographic Profile Summary File presents 100% of data obtained in the 2010 decennial census and provides details about race and Hispanic groups, age, sex, and housing status of the US population. The profiles are released on a state-by-state basis for each of the 50 states, Washington, DC, and Puerto Rico.
http://www2.census.gov/census_2010/03-Demographic_Profile/
Category: Population and Income
Subject: Groups, Age, Population Size, Gender, Population
Source: United States Census Bureau
The United States Census Bureau is a bureau of the United States Department of Commerce. The major functions of the Census Bureau are authorized by Article 2, Section 2 of the United States Constitution, which provides that a census of population shall be taken every 10 years, and by Title 13 and Title 26 of the United States Code of Federal Regulations.
The Census Bureau is responsible for numerous statistical programs, including census and surveys of households, governments, manufacturing and industries, and for United States foreign trade statistics. The first United States census was conducted in 1790 for the purposes of apportioning state representation in the House of Representatives of the United States and for the apportionment of taxes.
http://www.census.gov