Population profile

A population profile shows the number of people as a function of the thier age. Population profiles can be displayed in many different forms such as pie charts or bar graphs. This bar graph shows the percent of population of U.S. immigrants by age in 2004.

http://www.populationaction.org/Publications/Reports/The_Shape_of_Things_to_Come/Chapter_Six_Subtypes_and_a_Speculative_Structure.shtml