Actually, if you look at the numbers, one thing that's very interesting was your mention of a 0.8% increase. That's actually far lower than the long-term 10-year trend for gasoline, which is a 1.7% increase each and every year. So what we've seen actually is that prices have had an impact on habits.
For the last three years, the volumes have been quite interesting. Starting at 40.9 billion in 2004, we dropped down to 40.8 billion in 2005, and then we snuck back up to 40.9 in 2006; vis-à-vis the long-term trend, we've seen quite a change. It'll take a few more years to play out, but we'll certainly see what happens.