That's a great question. I think definitely for the foreseeable future, you're going to see diesel and CNG for the internal combustion engine, and the big question is how quickly the adoption rate is going to be there on battery-electric.
I believe you'll see a fairly significant percentage in a decade, something sizable. I don't know if that's going to be 20% or 25%.
You guys might feel different. I'm not sure.