The history we see in upgrading is that the technology has developed very slowly. The first plant that Suncor started in 1967 and an expansion they did in 2000 used basically the same suite of technologies. We've seen incremental improvements in upgrading, but we haven't seen major breakthroughs.
My hope personally is that some of the work we're doing in the lab and work that's going on in a number of innovative small companies and large companies will result in some very different upgrading technologies within the next decade, but it has been slow to develop. I certainly acknowledge that.