The U.S. Census Bureau recently reported that the dependency ratio, or the number of people 65 and older to every 100 people of traditional working ages, is projected to climb rapidly from 22 in 2010 to 35 in 2030. This time period coincides with the time when baby boomers are moving into the 65 and older age category. After 2030, however, the ratio of the aging population to the working-age population (ages 20 to 64) will rise more slowly, to 37 in 2050. The higher this old-age dependency ratio, the greater the potential burden.
The projections are not based on 2010 Census results. Rather, they project 2000 Census counts forward using components of population change — births, deaths and net international migration.