Samples of data sources for measuring this outcome:
Disability rates decrease

Data source

U.S. Census Bureau American Fact Finder - Civilian population with a diability by type, age, and race
National level resources - Under search terms, enter "Disability" and "United States."
U.S. Census Bureau American Fact Finder - Civilian population with a diability by type, age, and race
State level resources - Under search terms, enter "Disability" and state name.
U.S. Census Bureau American Fact Finder - Civilian population with a diability by type, age, and race
County level resources - Under search terms, enter "Disability" and county name.
U.S. Census Bureau American Fact Finder - Civilian population with a diability by type, age, and race
City level resources - Under search terms, enter "Disability" and city name.