According to a 2011 analysis from the Urban Institute, "adults 50 and older made up 31% of the labor force in 2010, up from 20 percent in 1995." (p. vii)
Johnson, R. W., & Mommaerts, C. (2011). Age differences in job loss, job search, and reemployment. (Program on Retirement Policy, Discussion Paper No. 11-01). Washington, DC: Urban Institute. Retrieved from http://www.urban.org/UploadedPDF/412284-Age-Differences.pdf