I think the system grows and changes. It is a commercial system, and the various parties make investments in the system in order to improve. Railways make investments to improve their business, and shippers make improvements.
Shawn did mention a couple of those things, just as examples of how the business is healthy and a lot of investments are being made in the industry. It's a good indication that it's healthy and profitable. Pointing to specific investments that we have a metric on for how it has improved probably would be something that the companies making those investments would be better placed to answer.