Research is going on to improve the ability to take a higher percentage. I think I mentioned before, we're probably taking in the order of something under 60% of the ethane that's in the natural gas right now, and we're improving the technology to make deeper cuts, also to extract ethane from other areas, such as the off-gases from the tar sands.
There is an area there where we can improve the technology and change that into value-added products, instead of what's happening today, which is recycling it and burning it and using it as an energy source to run more tar sands.
Yes, there is an improvement going on in the ability to get more. That ethane extraction policy that was developed was designed to reflect the fact that there is a much higher cost associated with doing that.