Outpatient treatment rates have held steady in the U.S. recently. Prior to this, outpatient treatment for ADHD in the U.S. grew from 0.9 children per 100 in 1987 to 3.4 per 100 in 1997. A survey conducted by the Centers for Disease Control and Prevention in 2011–2012 found 11% of children between the ages of 4 and 17 were reported to have ever received a health care provider diagnosis of ADHD at some point (15% of boys and 7% of girls), a 16% increase since 2007 and a 41% increase over the last decade. The CDC notes that community samples suggest the incidence of ADHD in American children is higher than the five percent stated by the American Psychiatric Association in DSM-5, with 8.8% of U.S. children having a current diagnosis in the 2011 survey. However, only 6.1% of children in the 2011 survey were taking ADHD medication, suggesting as many as 17.5% of children with current ADHD were not receiving treatment.