What an insipid piece of alarmist claptrap.  Another way to read this would be: "Young traffic accident deaths at historic lows." 
425 suicides?  Out of tens of millions of American youth? That's an amazingly small number!  We should be celebrating that the problem is so low and so rare. We should be cheering that traffic accident deaths are dropping like a rock. Instead, let's fear-monger a bit. This should be a positive story, not an excuse to clutch our pearls, wring our hands, and declare our kids at risk of another imaginary boogie man.