According to Centers for Medicare & Medicaid Services data, the balance in health spending has steadily shifted towards the public sector since 1960, when the government started keeping track.
To view the interactive graphic, click on the link that says "Click To Interact." (Please note: you may need to download Sun's Java Plugin to see the visualization.)
Graphic: Christopher Weaver and Beth Liu, KHN
1960-2008 Data Source: National Health Expenditure Accounts; 2009-2010 Data Source: Centers for Medicare and Medicaid Services, Office of the Actuary, National Health Statistics Group