via US Department of Labor site:
In June 2008, questions were added to the Current Population Survey (CPS) to identify persons with a disability in the civilian noninstitutional population age 16 and older. The addition of these questions allowed BLS to begin releasing monthly labor force data from the CPS for persons with a disability. The collection of these data is sponsored by the Department of Labor’s Office of Disability Employment Policy. Publication of CPS disability data began in February 2009 with the issuance of labor force data for January 2009. Explanatory materials are available on the frequently asked questions page. These materials provide information on comparisons with other data sources, variability of the data, and the types of data available. Additionally, links to historical data and alternate formats are located below.
You can view the statistics here.