Thank you, Chair.
Maybe I could add a few other comments to my colleague's views on this.
I think the other thing in terms of the unpredictability around the how and the why is largely that it's a marketplace as well and there's a constant flow of sometimes poorly regulated chemicals, which can be easily procured. To the extent that they are available, substances will go up and down in terms of usage. It's very difficult to really predict in terms of the cost, which is another factor for use. The cost of methamphetamine varies tremendously across the country. For example, on the west coast, where you could argue there may be greater access to precursors, the cost is somewhere between $30 and $50 a gram, whereas on the east coast, I understand it to be in the neighbourhood of three times to four times that cost for a gram.
All that is to say that market conditions and the availability of drugs is also a factor in the equation of figuring out what drug will be prominent. That is very hard to predict.