We'll give some information, but 90% is a commonly agreed upon number by researchers, and even the company records. But it would vary, and you're right about the evaporation. If you look at the tailings ponds and the water there, there is water that evaporates, and there is also condensation from the snow and the rain, and so on. If you'd like, we would be very happy to give you some account of that.
There are definitely some losses. That's why there is a draw from the river, to compensate for these losses. That's very well known. But one thing, actually, that is important is that there is a permission for the companies to withdraw certain amounts from the river, as given to them by the Alberta government, and I don't know of any company that has exceeded or even reached its level of allowance. It's always below the level of allowance. But that doesn't mean the technology is at its optimum. There is a lot of room there, and that's an area we're working in.