Percent Distribution of Office-Based Physicians by Age: United States, 2007-2012

2007 2008 2009 2010 2011 2012 Under 35 Years 8.2% 28.1% 3.3% 3.1% 2.6% 2.5% 35-44 Years 28.1% 26.9% 23.7% 22.8% 23.0% 22.7% 45-54 Years 35.0% 34.6% 31.9% 32.4% 28.3% 31.5% 55-64 Years 20.0% 24.2% 29.7% 28.7% 32.1% 30.0% 65 Years and Over 8.5% 11.2% 11.2% 12.9% 14.0% 13.2% Source: Centers for Disease Control and Prevention, National Center for Health Statistics