According to studies conducted by the CDC, children between the ages of 4-17 are being diagnosed with ADHD at a historically high rate.
http://www.nbc11news.com/home/headlines/Record-high-number-of-kids-being-diagnosed-with-ADHD-201152811.html
http://www.nbc11news.com/home/headlines/Record-high-number-of-kids-being-diagnosed-with-ADHD-201152811.html