During 2011–2012, among children aged 6–17 years, 7.5% overall had been prescribed medication for emotional or behavioral difficulties during the preceding 6 months. By U.S. Census region, the percentages were 9.3% in the South, 8.0% in the Midwest, 6.3% in the Northeast, and 5.0% in the West.
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6317a9.htm?s_cid=mm6317a9_e
NCHStats 