Thank you very much, Mr. Chair.
I'm quite interested in this study, having had a former career as a police officer and three years of drug work. I'm quite intrigued by this.
First, to Dr. Kahan and/or Dr. Kalant, can you tell us what the increase has been since the eighties—I'll arbitrarily use the eighties, but we can go to the seventies, if you so choose—of tetrahydrocannabinol in the patients that you see?