I think that's a reasonable number, although as an economist I'll tell you that if we look at the energy system itself, we ought to have longer timeframes in mind. I'll just mention one of them, and that's the idea of rights-of-way for new pipeline expansion or new technology that we don't even know is going to exist tomorrow. That timeline is probably 60 to 100 years long if we plan effectively. So we ought to have longer timeframes in mind, including some of the support that we're going to need in terms of government tax policy or even regulatory strategies.
On February 7th, 2012. See this statement in context.