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Last Thursday, US Surgeon General Vivek Murthy made headlines by boldly proclaiming that teen e-cigarette use is a “major public health concern.” The assertion came alongside a government report with some eye-popping figures, including that e-cigarette use among high school students increased by more than 900 percent between 2011 and 2015. The apparent blaze in popularity led Murthy and other public health experts to worry that vaping could blow up rates of teen smoking and life-long nicotine addictions.

But new data released stands to stamp out some of that alarm.

In 2016, e-cigarette use among teens dipped for the first time since the devices gained popularity in the last decade or so, according to public health researchers at the University of Michigan. And e-cigs aren’t the only unhip substances among the youths—teen use of regular cigarettes, as well as alcohol and illicit drugs, continued its long-term decline, hitting record lows this year.