Teenage alcohol and tobacco use is at a historic low, according to a recent survey by the University of Michigan at Ann Arbor. The study, which surveyed teenagers from 1975 to 2012, revealed that young people are drinking alcohol and smoking cigarettes less frequently than previous generations. The survey also showed that teens are less likely to experiment with unpredictable synthetic drugs ... but use cannabis more frequently. In the past year, high school students who reported smoking cigarettes in the previous 30 days declined from 10.6 percent to 9.6 percent - a statistically significant reduction. Teenage smoking peaked between 1996-1997 and the numbers have been steadily declining since, according to the survey. The use of synthetic marijuana (known as K-2 or Spice) and bath salts" also sharply decreased among teens in the past year. Marijuana use, however, has been on the rise in recent years. The percentage of eighth grade students who have used marijuana in the previous 12 months rose from 11.4 to 12.7 and 10th grade students saw an increase from 28 to 29.8 percent. The survey seems to suggest that the increase is driven by students' perceived lack of risk in using marijuana. Most other individual illicit drugs did not see significant change. Alcohol use also saw a dramatic decline, particularly among younger teens. Alcohol use and binge drinking among the grades surveyed is at the lowest it has been since the 1990s.