I'd say they're also on the way up because propane is also, relatively speaking, affordable. As natural gas has become more abundant, so has propane. It's available in different markets. Certain markets will be using these products more than others. For instance, in northern Saskatchewan there's extensive propane use by industry and homes that are off-grid. It really depends on the availability of the fuel, the existing infrastructure, etc., as to which is used.
So, propane is on the way up. I think the prospects for natural gas are significantly greater.