It's difficult, because currently we don't have a lot of good data so we don't know the full scope of it. If we look at the International Narcotics Control Board data, Canada is one of the highest—I believe it was the highest in 2011—prescriber or consumer per capita of Ritalin.
I think the reason for that is poorly understood. It may be that in Canada we diagnose ADD more commonly. We know that recreational use of it has developed among college and university students who want to enhance their academic performance. We also know that it's misused commonly with other medications of abuse. It can be snorted and give an effect similar to that with cocaine. It can also be used to counteract the side effects of other medications or illicit drugs.
The reality is it hasn't received a lot of attention. We really don't have a lot of good data to know how much of an issue this is in Canada. Once again it speaks to the importance of having a surveillance system so that when we start to see that the use in Canada is rising, we can take proactive measures to evaluate that and develop strategies to improve the situation and reduce the harm.