ocr: Population of the United States by Age, 18/0-1990 (in thousands] Year Under 5 5-9 10-14 15-19 20-29 30-39 years years years years years years 1870 5,515 4,815 4,786 4,041 6,823 4,878 1880 6,915 6,480 5,715 5,011 9,168 6,369 1890 7,635 7,574 7,034 6,558 11,424 8,445 1900 9,171 8,874 8,080 7,566 13,864 10,521 1910 10,631 9,761 9,107 9,064 17,237 13,368 1920 11,573 11,398 10,641 9,431 18,364 15,846 1930 11,444 12,608 12,005 11,552 20,704 18,329 1940 10,542 10,685 11,746 12,334 22,684 19,788 40 Source:U.S. Bureau of the Census
