Population of young adults (18-24)

Definitions: Number of young adults (18-24 years)

Data Source:
For 2000 and 2010 data
Decennial Census Program Citation:
U.S. Census Bureau, Census 2000 Summary File 2, Matrices PCT3 and PCT4.
U.C. Census Bureau, Census 2010 Summary File 2, Tables PCT3 and PCT4.

For post-Decennial Census years (2011-2015) data
Population Estimates Program Citation:
Annual Estimates of the Resident Population for Selected Age Groups by Sex for the United States, States, Counties, and Puerto Rico Commonwealth and Municipios: April 1, 2010 to July 1, 2015
Source: U.S. Census Bureau, Population Division (Release Date: June 2016)

Technical Note:
The Population Estimates Program data are revised to reflect updated input data and new Census Bureau population controls. Population estimates for previous years change with the release of each new 5-year Census estimate. 

Definitions: Number of young adults (18-24 years)

Data Source:
For 2000 and 2010 data
Decennial Census Program Citation:
U.S. Census Bureau, Census 2000 Summary File 2, Matrices PCT3 and PCT4.
U.C. Census Bureau, Census 2010 Summary File 2, Tables PCT3 and PCT4.

For post-Decennial Census years (2011-2015) data
Population Estimates Program Citation:
Annual Estimates of the Resident Population for Selected Age Groups by Sex for the United States, States, Counties, and Puerto Rico Commonwealth and Municipios: April 1, 2010 to July 1, 2015
Source: U.S. Census Bureau, Population Division (Release Date: June 2016)

Technical Note:
The Population Estimates Program data are revised to reflect updated input data and new Census Bureau population controls. Population estimates for previous years change with the release of each new 5-year Census estimate.