Share of Population by Age, Arizona and United States, Change, 2000 to 2010
In Arizona, in each age group through age 44, the size as a proportion of the total was lower in 2010 than in 2000 (except for no change in the percentage in the 15-19 age group), while the proportion rose between 2000 and 2010 in the 45-69 age groups. The aging of the baby-boom generation (those born from 1946 through 1964) is the primary factor that caused the share of those 35 to 44 to decline and the share of those 55 to 64 to increase.
Relative to the national average, the changes in Arizona were slightly less negative among children, more negative among those 20 to 29, less negative for those 35 to 44, and less positive for those 50 to 59. The change in share among those 60 or older was nearly identical to the U.S. average.