|Table A31. Number and percentage of adults ages 18 and older who have a work credential (license or certification), by adults' educational attainment level: 2012|
|Educational attainment level||Number (in thousands)||Percent|
|Less than high school||1,315||5.5|
|High school completion (no college)||9,891||13.9|
|NOTE: Missing data were not imputed.
SOURCE: U.S. Census Bureau, Survey of Income and Program Participation, 2008 panel, wave 13 (Sept.–Dec. 2012).