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.

In a statement, the lead researcher of the Michigan study, Lloyd Johnston, noted that there are still many kids at risk of substance abuse but that drug use trends are going “in the right direction."

In terms of e-cigarettes, "it’s still too early to know if this year’s dip shows a peak or pause,” said Richard Miech, another Michigan researcher. "In the past, we have seen new drugs follow a pattern in which use increases at a fast pace during a honeymoon period and then reverses course and declines as knowledge of the substance's drawbacks become known."

In 2011, when e-cigarettes were up-and-coming, about 1.5 percent of high school students said they had vaped at least once in the 30 days prior to being surveyed. In 2015, that number jumped to 16 percent—the source of the concerning ‘more than 900 percent’ statistic. But in 2016, vaping dropped down to 13 percent for twelfth-graders and 11 percent among tenth-graders. Kids in eighth grade also saw a dip from 8 percent to 6 percent.

Moreover, it’s worth emphasizing that those percentages include kids who may have only vaped once or a few times in the 30 days prior to taking the survey. In 2015, only 2.5 percent of high schoolers said they vaped frequently—defined as 20 or more days in the last 30. That’s just 15 percent of those that said they vaped in the past 30 days.

For cigarettes, the decline in teenage use rolled on this year. After a peak in 1997, teen smoking levels of 2016 are the lowest levels ever recorded in 42 years of tracking. Among twelfth-graders, those that smoked in the 30 days prior to being surveyed fell from 11.4 percent in 2015 to 10.5 percent in 2016. For tenth-graders, that figure dropped from 6.3 percent to 4.9 and from 3.6 percent to 2.6 percent among eighth-grade students.

This point is particularly important because the main concern over e-cigarette use by young people is that it will lure them to smoking, setting the stage for life-long addictions.

In a statement, Deborah Arnott, chief executive of Action on Smoking & Health (ASH), a large anti-smoking group in the United Kingdom, said:

ASH is puzzled by the level of concern being expressed about e-cigarettes by the Surgeon General. In the US as in the UK, young people are experimenting with e-cigarettes but vaping has not been associated with an increase in smoking, a point which is not made sufficiently clear in the report.

Vaping proponents aren’t so much puzzled as annoyed by the Surgeon General’s recent claim. “This is just another politically motivated attack on an industry that is helping people quit smoking,” Gregory Conley, president of the American Vaping Association, said in a statement.

The new data by Michigan researchers also noted record lows in use of alcohol, including binge drinking, as well as illicit drugs, such as marijuana and ecstasy. The data will be published in full in January by Michigan’s ongoing Monitoring the Future study group.