Yes, there's a steady trend upward, but for the harvest, if you take the three-year average, you're going to be able to predict with pretty good certainty the size of the crop you're supposed to move each year, and the railways do that. They plan operationally months and months ahead of time for the crop. They assume a crop size.
Yes, you should be able to plan, but the reality is that they don't necessarily plan based on the demand of the industry. They plan on how they want to utilize their assets. The capacity they plan isn't necessarily always going to meet the demand that's required, just by the very fact that they don't have to respond to all the demand when it comes at them.