Silver Book Fact
Growth of older population by age group, 1990-2008
In 2008, the 65-74 age group (20.1 million) was over 9 times larger than in 1900. In contrast, the 75-84 group (13 million) was 17 times larger and the 85 and older group (5.7 million) was 47 times larger.
Administration on Aging. A Profile of Older Americans: 2009. Washington, DC: US Department of Health and Human Services; 2010. https://www.acl.gov/sites/default/files/Aging%20and%20Disability%20in%20America/2009profile_508.pdf