That was based on a fairly conservative fuel model as well. If the natural gas prices stay as depressed as they are today, or possibly even lower, then obviously that period becomes shorter again. We haven't done that study for the bigger facility, of a new facility, plus 400 buses. Obviously, with the more buses or more vehicles you have, you expect that payback period to become quicker.
On May 1st, 2012. See this statement in context.