It's about five per cent, so there's a significant amount more energy in what we call “spent” nuclear fuel, and there are promising technologies that will enable us to access that other 95%.
That was a big part of our plans early on in the evolution of nuclear energy. Obviously we've discovered that there's a lot more uranium in the world, and it's more economical to use that at this time, but certainly these are promising technologies that we should look into it as a tier 1 nuclear nation.