International Center for Disability Information
By State, The Total Civilian Noninstitutionalized Population 5 Years Old And Over Reporting A Disability, By Age Group (2000).

Note: People age 5 years old and over are considered to have a disability if they report one or more of the following criteria from one or more of the following categories as defined by the 2000 U.S. Census:
(a) sensory disability: blindness, deafness, or severe vision or hearing impairment;
(b) physical disability: substantial limitation in the ability to perform basic physical activities, such as walking, climbing stairs, reaching, lifting, or carrying;
(c) mental disability: difficulty learning, remembering, or concentrating;
(d) self-care disability: difficulty dressing, bathing, or getting around inside the home.
In addition to the above, people 16 years old and over are considered to have a disability if they report:
(e) go-outside-home disability: difficulty going outside the home alone to shop or visit a doctor's office.
People age 16-64 years are considered to have a disability if they report any of the above and/or:
(f) employment disability: difficulty working at a job or business.
Therefore, the column "Total Population Age 5-15 Reporting Disability" includes only disabilities from categories (a), (b), (c), and (d).
The column "Total Population Age 16-64 Reporting Disability" includes disabilities from categories (a), (b), (c), (d), (e), and (f).
The column "Total Population Age 65 And Over Reporting Disability" includes only disabilities from categories (a), (b), (c), (d), and (e).

To find the percent of people in a state reporting a disability, divide the total population in the state reporting a disability by the total population of the state and multiply the result by 100. Example: Calculate the total percent of people in Texas reporting a disability. This calculation would be: 3,605,542/18,761,475=.1922 and .1922x100=19.22%

Source: U.S. Census Bureau, Census 2000