ATLANTA, GA (WTVB) - Here’s a sign of progress. Cigarette smoking among America's teens is now at the lowest level in more than 20 years. The Centers for Disease Control and Prevention says fewer than 16% of high school students across the country were current smokers in 2013. By comparison the teen smoking rate was above 27% when the government started doing its Youth Risk Behavior Survey with teens back in 1991. The survey also shows the number of students threatened with or injured by a gun or other weapon on school property has dropped to just under 7% from a high of more than 9% in 2003. Teens also are drinking less alcohol and soda, having less sex, using birth control more often, and getting into fewer fights One area of concern is that the estimated one-third of U.S. teens who are sexually active are using condoms less often than they were a decade ago. Using condoms helps protect teens from getting HIV and other sexually transmitted diseases.