I think demurrage has been around probably for a hundred years. Some of the other ones are fairly new. The fuel surcharge is fairly recent, just when the crude oil prices started to become quite volatile. So that's a fairly recent charge.
Things like the charge for submitting a paper bill of lading are quite new. There the railway is saying to its customers they want to go to electronic data interchange. And that's fine; we all like the idea of electronic data interchange. But the railways are in a position where they can tell their customers to do electronic data interchange, otherwise they're going to pay extra. Not very many other businesses can do that.
I would say a lot of these are fairly new. Some of them have been around for a long time. Weighing of cars, storage of cars, some of those things have been around for a long time.