Silver Book Fact
From 2004-2005, 25% of 65-74 year olds and 60% of adults aged 85 and older reported a limitation of activity due to chronic conditions.
Centers for Disease Control and Prevention, National Center for Health Statistics. Health, United States, 2007: with chartbook on trends in the health of Americans. Atlanta, GA: Centers for Disease Control and Prevention; November 2007. http://www.cdc.gov/nchs/data/hus/hus07.pdf