Clearly the transportation issues are what is driving the difference between the price of WTI and WCS. How serious is it? If you happen to be one of those companies that has the marginal barrel of oil that needs to be shipped by rail, you're getting paid a lot less for it. Also, you may be displacing some agricultural product. As we know when we talk to companies—and you know it too—they also have to wait and maybe have stockpiles of their product to ship as well.
About 93% of the oil is actually shipped by pipeline, so it covers a smaller proportion of the oil than one might imagine. As well, within that, some of the returns—the costs that are being paid for the rail—are actually accruing to Canadian railway companies, so not all of that is lost.
A cost that's outside how much I get paid today and how much I could get paid if the price were higher is really what it does to investment in the sector, where a price at that level may make it so that there's no business case to create further capacity. Certainly in our outlook, as you can see from one of the charts, investment in the energy sector is rather flat and slightly declining over the projection horizon because of that.