This chart shows the large increases in the population 65 and older from 3.1 million people in 1900 to 35 million in 2000 and projected to 72 million in 2030.
Chart source: Projections for 2010 through 2050 are from: Table 12. Projections of the Population by Age and Sex for the United States: 2010 to 2050 (NP2008-T12), Population Division, U.S. Census Bureau; Release Date: August 14, 2008. The source of the data for 1900 to 2000 is Table 5. Population by Age and Sex for the United States: 1900 to 2000, Part A. Number, Hobbs, Frank and Nicole Stoops, U.S. Census Bureau, Census 2000 Special Reports, Series CENSR-4, Demographic Trends in the 20th Century. This table was compiled by the U.S. Administration on Aging using the Census data noted.
Bullets source: National Alliance on Mental Illness: Wall Street Journal, September 24th, 2013