Each year since 1975, a survey called Monitoring the Future (MTF) has peeked into the lives of U.S. youth to see what they really think about drugs and alcohol and, more crucially, what they’re doing with them...According to the 2015 survey, which queried close to 45,000 students in eighth, 10th and12th grades, drug use is either down or stable virtually across the board, tobacco use is plummeting, and underage drinking continues its decline.