1. Source: U.S. Census Bureau, 2009 Population Estimates.

2. The Urban Institute and Kaiser Commission on Medicaid and the Uninsured estimates based on data from Medicaid Statistical Information System (MSIS) reports from the Centers for Medicare and Medicaid Services (CMS), 2010.

3. National Conference of State Legislatures: State Budget Update July 2009 (for most states)

4. Urban Institute and Kaiser Commission on Medicaid and the Uninsured estimates based on data from Centers for Medicare and Medicaid Services HCFA-64 reports, 2010.