Yes. If you were to go back to 11 years ago, it would have been a very difficult data set to put together that would have been telling.... In the 11 years since then, railways have pretty much mechanized and systematized the car order process. It would be a much simpler thing to do today than it would have been 11 years ago. I would point to that as being the primary reason.
The secondary reason is a great reluctance on the part of the railways to share that kind of information.