There are regions where, for example, for some of the early LEED buildings, it cost 6% to 8% more. They were relatively small. The payback then was 10 years, but with just the slide in energy prices they were paid back in five or six years. There are a lot of variables that play into that, but what we found is that the payback periods, actually, are quite reasonable over all.
The bigger the building is, the easier time you have of it, obviously.