Annual Statistical Supplement to the Social Security Bulletin, 2008
http://www.ssa.gov/policy/docs/statcomps/supplement/2008/
The major annual statistical compilation on U.S. social insurance and welfare programs. Covers the Old Age, Survivors, and Disability Insurance and the Supplemental Security Income Programs of the Social Security Administration plus major health care programs--Medicare and Medicaid--and social insurance programs such as workers' compensation, unemployment insurance, temporary disability insurance, Black Lung benefits, and veterans' benefits. From the Social Security Administration.
