DISABILITY

"The number of impaired or blind among the population aged 90 and older is forecast to increase nearly 3.5 fold by 2050." - preventblindness.org

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“22% of adults in the US have some type of disability, with 13% having a physical disability that limits walking.”

The Center for Disease Control & Prevention 

http://www.cdc.gov/ncbddd/disabilityandhealth/infographic-disability-impacts-all.html