It's a very interesting and a very good question.
It's hard for us to separate the cause and effect when it comes to ridership. There are so many different factors out there in terms of the growth of population, in terms of the fiscal incentives, in terms of the environment, and the cost of fuel and operating cars. We've seen a steady increase in ridership over the last 10 years across the country of somewhere between 3% and 4% a year.