Silver Book Fact
By 2017, U.S. health care spending is expected to grow to more than $4.3 trillion and comprise 19.5% of the GDP.
Centers for Medicare and Medicaid Services. National Health Expenditure Projections 2007-2017. U.S. Department of Health and Human Services; 2008. http://www.cms.hhs.gov/NationalHealthExpendData/Downloads/proj2007.pdf