Silver Book Fact
In 2009, half of the adult population in the U.S.—133 million—was living with at least one chronic disease.
Centers for Disease Control and Prevention. Chronic Diseases the Power to Prevent, The Call to Control: At a glance 2009.. Atlanta, GA: Centers for Disease Control & Prevention; 2009. http://www.cdc.gov/chronicdisease/resources/publications/aag/pdf/chronic.pdf