Thank you for the question.
Just to clarify, what I had said was that we used to talk about 30 years of supply; we now talk about more than 100 years of supply. The reason we talk about more than 100 years of supply is that unconventional supplies across North America have come into the marketplace.
Yes, that does include shale gases. That's part of the unconventional supply. Those are being developed extensively right now, as you know, in western Canada, in British Columbia, and opportunities exist for significant development in Alberta as well. Eastern supplies have not been developed at this time. As you know, in the province of Quebec there is a study under way on the advisability of developing the shale gas resource in Quebec, and so too in New Brunswick; studies are under way about the development of the resource there. Significant shale gas supplies, or very closely related formations, are occurring in the eastern United States, in the Utica and Marcellus shale basins.
So those are part of that new assessment, yes.