http://www.cdc.gov/od/oc/media/pressrel/r030811.htm
National Center for Health Statistics, Centers for Disease Control and Prevention
Over half (53 percent) of patients visiting the doctor in 2001 were over age 45, according to the latest annual report from CDC’s National Ambulatory Medical Care Survey, which looks at the medical care provided in physicians’ offices. That’s compared to 42 percent in 1992.