Share of Population by Age, Arizona and United States, 2010
Each five-year age group through age 54 accounted for between 6.4 and 7.2 percent of the total Arizona population in 2010. The proportion was increasingly smaller in the older age groups, in large part due to deaths. In addition, the original cohort size, based on the number of births, was smaller for those age groups of at least age 65.
Compared to the national average, Arizona had a higher proportion of children less than 15 years of age, a lower proportion of adults from ages 40 through 59, and a higher proportion of senior citizens between the ages of 65 and 74.