In 2005, 42 percent of fatally injured motorcycle operators and 50 percent of fatally injured passengers were not wearing helmets at the time of the crash. (NHTSA 2005 Traffic Safety Facts Overview)
PFDA--According to the 2001 Partnership Attitude Tracking Study, an estimated 23.6 million teens are in grades seven through 12 in America today. (this article outlines how many teens are using drugs, and which types)