I'm going to talk about general population surveys, where sometimes the figures come from the States. At this point in time, looking at the last 20 years, the rates for alcohol are—the answer for you is to go drug by drug—more or less steady, maybe slightly increased, but really steady.
There's an interesting phenomenon among the final grades of school. While we are very proud of the fact that we have reduced the rates of tobacco use, which have really come down, well, marijuana use has gone up. That's really what it is today.
Opioids, I think, are a more episodic phenomenon. I don't think we have 20-year studies on that. At this point in time, they've been on a high, particularly for overdoses and so forth.