Thank you very much, and thank you very much for your testimony.
I have in front of me a letter from the State of Colorado to the Honourable Jefferson Sessions dealing with, I think, some questions that were obviously asked of you. One of the points that really jumped out at me was that the most recent national survey on drug use and health showed that between 2013-14 and 2015-16, the period in which adult use marijuana business opened their doors, youth marijuana use declined by 12%. I contrast that to the Canadian experience during that exact same timeframe when it increased by 1%, and slightly more amongst female users.
I guess there are three potential factors in here. One that I also see in the letter is that $22 million in marijuana tax revenue was appropriated for use in public education campaigns. You're clearly doing more on public education. There are strong regulatory provisions governing marijuana sales to youth, including age verification, and prohibitions on advertising packaging and whatnot that would be attractive to youth. Then, presumably, there is the exclusion of, or more restrictions on the black market providers.
I know it's probably all three that have made a difference in those youth utilization rates. Do you have any sense if there was a magic bullet in those three, one that you really felt was effective in stopping youth use of marijuana?