The results come from a study of 13,000 U.S. high school students last spring. Participation was voluntary and required parental permission, but responses were anonymous.
Highlights of the study released Thursday:
Fewer than 16 percent of the teens smoked a cigarette in the previous month — the lowest level since the government started doing the survey. Another CDC study had already put the teen smoking rate below 16 percent, but experts tend to treat this survey's result as the official number. It's "terrific news for America's health," said Matt Myers, president of the Campaign for Tobacco-Free Kids. Even so, there are still about 2.7 million teens smoking, he said.
The survey did not ask about electronic cigarettes.
Meanwhile, more than 23 percent of teens said they used marijuana in the previous month. CDC officials said they could not tell if, or to what extent, marijuana or e-cigarettes have replaced traditional cigarettes among teens.
Fights at school fell by half in the past 20 years. And there was a dramatic drop in kids reporting they had been in a fight anywhere in the preceding year — about 25 percent, down from 33 percent two years earlier. The addition of more guards and other security measures may be a factor, said school violence expert Todd DeMitchell of the University of New Hampshire.
Among teen drivers, 41 percent had texted or emailed behind the wheel in the previous month. That figure can't be compared to the 2011 survey, though, because the CDC changed the question from the last time. The latest survey gives texting-while-driving figures for 37 states — ranging from 32 percent in Massachusetts to 61 percent in South Dakota.
Fewer teens said they drank alcohol. Drinking of soda was down, too. About 35 percent said they had had booze in the previous month, down from 39 percent in 2011. About 27 percent said they drank soda each day. That was only a slight change from 2011 but a sizable drop from 34 percent in 2007.
The proportion of teens who had sex in the previous three months held steady at about 34 percent from 2011. Among them, condom use was unchanged at about 60 percent.