That sounds like a fairly straightforward question, but it's not. Our focus there, as you mention, is that the lower net price received by Canadian producers of new oil from the oil sands in particular, heavy oil, is a factor that is constraining investment in new projects in that particular sector. For us, for forward-looking purposes, that's the most important channel of effect.
The question about the gap between WCS and WTI and the effect it's having on the economy has a lot of complicated calculations in it. Not all of Canadian oil production, of course, is paid that price. Some of it is already committed on a pipeline. Other companies have a full upstream and downstream system so aren't hit by the same issue. As well, part of the premium is paid to the transportation companies, so some of that money stays in Canada.
It's very hard to isolate that number. It's not that important to us in the sense of how to make a forecast. It's important that GDP is what it is. The question is, how will it grow from here? In that case, we believe that investment in that sector will remain flat in our forecast because, of course, one of our assumptions is that oil prices stay constant in our forecast.