Not to eviscerate my already non-existent family values cred, but who gets to decide that fewer teenagers having sex is a "positive trend?" If I were one of those sexless teenagers, I'd be writing an angry letter right about now. And how is the sex? The relevant measure isn't of its quantity, I'd think, but its quality. Is anyone collecting data on incidence of orgasm? Won't somebody please think of the children!?
The sex data, by the way, comes in sentence one of the article. It takes us till paragraph 3 to learn of the four percent increase in teenager's graduating high school. Gotta have your priorities, I guess.