I guess history has a way of repeating itself.
It's many different things. Part of it is that the technology back then was not as good as it is today. That technology led some people away from propane. Once you lose a customer, it's hard to bring that customer back.
We're now at a point where technology has advanced so much that you literally can drive your fleet or pickup truck and not have to hit a switch anymore; it's all done. There's no loss of distance and that kind of stuff. It requires a re-education on the industry's part to bring it all back.
However, you're right, Mr. Chairman: the first propane-powered vehicle was introduced in the 1920s, so it's been around for quite some time.