Age group	1950	2050
Under 10 years	29.3	56.2
10 to 19 years	21.8	56.7
20 to 29 years	24.0	56.2
30 to 39 years	22.8	55.9
40 to 49 years	19.3	52.8
50 to 59 years	15.5	49.1
60 to 69 years	11.0	45.0
70 to 79 years	5.5	34.5
80 to 89 years	1.6	23.7
90 to 99 years	0.1	8.1
100 years and over	—	0.6
Total	151.1	310.6
Source: Statistical Abstract of the United States, www.census.gov/library/publications/2009/compendia/statab/129ed.html; and Census Bureau, www.census.gov/population/projections/.