The number of railcars changes by the amount of oil that's being shipped. As I stated in my earlier comments, right now there are two very active and busy mines. Bloom Lake has just come back on again. Each one of these companies supplies their own railcars.
The rail line runs 24 hours a day, seven days a week, and as each company increases its production it also increases the amount of cars. For example, Bloom Lake, which just came back online, has about 250 extra railcars on the line right now.