The percentage of Montana students ages 6-21 with hearing impairments in 2011 was .05%.
…
There are 16,554 individuals aged 18-64 who are deaf.
Source: Montana Department of Public Health and Human Services. Hearing Impairment
Disability demographics
Disability demographics is the result of the available data on people with disabilities.
Quote
Because when we have an inaccessible site, we are telling a quarter of the U.S. and Canadian population, 15% of the people worldwide, that your voice isn’t important.
Donna Bungard, Accessibility Program Manager
How many people on Earth have a disability?
The World Health Organization suggests there are more than 1.3 billion people on Earth with a disability. Source: World Health Organization (2022)