[protected-iframe id="e90a33ded3dbc6f4398fcf9fc9373a15-1359921-157112530" info="//datawrapper.dwcdn.net/gjMHl/2/" width="650" height="400" frameborder="0" style="border: none;" scrolling="no"]U.S. suicide rates are at their highest since World War II, according to federal data—and the opioid crisis, widespread social media use and high rates of stress may be among the myriad contributing factors.