Disabled workers are less likely to be employed, and among those who are, they tend to make lower pay, according to the U.S. Census Bureau's American Community Survey.

The survey finds that more than half of disabled workers are primarily in four general occupation groups: service workers at 18.2 percent; administrative support at 15.1 percent; sales workers at 10.4 percent; and management, business and finance at 8.9 percent. For specific jobs, 315,000 janitors and building cleaners are disabled, 263,000 drivers and truck drivers are disabled, 256,000 cashiers are disabled, and 223,000 retails salespeople are disabled.

Of the job roles with at least 100,000 people, the highest disability rates are among dishwashers at 14.3 percent, refuse and recyclable material collectors at 12.7 percent, personal care aides at 11.9 percent, and janitors and building cleaners at 11.8 percent. Fifty-two percent of respondents made less than $25,000 in the previous year as opposed to 38 percent of workers with no disabilities. The earnings gap comes to about 75 percent of what workers without disabilities make.