CDC: 15% of American children have a developmental disability

From NPR:Fifteen percent of American children have a developmental disability, including autism and ADHD, according to a new report from the federal Centers for Disease Control and Prevention.That's an increase of almost 2 percentage points from 1997 to 2008, or almost 2 million kids. But that number may be squishier than it sounds.The new figure comes from the National Health Interview Surveys,