"Compared to teens in families with strong Family Ties, teens in families with weak Family Ties are:
"• Four times likelier to have tried tobacco;
"• Four times likelier to have tried marijuana; and
"• Almost three times likelier to have tried alcohol."

"Crack cocaine use spread rapidly from the early to mid-1980s. Still, among 12th graders, the use of crack remained relatively low during this period (3.9% annual prevalence in 1987). Clearly, crack had quickly attained a reputation as a dangerous drug, and by the time of our first measurement of perceived risk in 1987, it was seen as the most dangerous of all drugs. Annual prevalence dropped sharply in the next few years, reaching 1.5% by 1991, where it remained through 1993.