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- Population of the United States by Age, 1870Ð1990
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- (in thousands)
- Year Under 5 years 5-9 years 10-14 years 15-19 years 20-29 years 30-39 years 40-49 years 50-59 years 60 years and above
- 1870 5,515 4,815 4,786 4,041 6,823 4,878 3,519 2,245 1,933
- 1880 6,915 6,480 5,715 5,011 9,168 6,369 4558 3,111 2,878
- 1890 7,635 7,574 7,034 6,558 11,424 8,445 5,917 3,999 3,875
- 1900 9,171 8,874 8,080 7,566 13,864 10,521 7,702 5,154 4,872
- 1910 10,631 9,761 9,107 9,064 17,237 13,368 9,731 6,668 6,217
- 1920 11,573 11,398 10,641 9,431 18,364 15,846 12,109 8,284 7,916
- 1930 11,444 12,608 12,005 11,552 20,704 18,329 15,032 10,621 10,385
- 1940 10,542 10,685 11,746 12,334 22,684 19,788 18,043 13,101 13,748
- 1950 16,164 13,200 11,119 10,617 23,724 22,763 19,274 15,507 18,329
- 1960 20,320 18,692 16,773 13,219 21,670 24,430 22,480 18,036 23,702
- 1970 17,163 19,969 20,804 19,084 29,869 22,550 24,112 21,090 28,596
- 1980 16,348 16,700 18,242 21,168 40,840 31,526 22,759 23,325 35,638
- 1990 18,757 18,035 17,060 17,886 40,463 41,679 31,333 21,800 41,705
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- Source: U.S. Bureau of the Census
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