As a basic rule, and the winds tend to go east-west, so that's a big reason why that happened.
I want to move on to night flights. A formula is used at Pearson in how many flights are allowed to come in and out of Pearson, and I believe the formula is based on an annual basis, as opposed to a per night basis. As a result of that, on any given night, depending on winds and other things, there could be a much higher volume of night flight traffic coming in. Isn't that correct?