"Note: Data on medical services utilization are not available in the SIPP for 2006, 2007, and 2008. Source: U.S. Census Bureau, Survey of Income and Program Participation, 2001 Panel, waves 3, 6, and 9; 2004 Panel, waves 3 and 6;and 2008 Panel, waves 4 and 7. Chart from ""Health Status, Health Insurance, and Medical Services Utilization: 2010,"" by Brett O'Hara and Kyle Caswell."