From an ultimate outcome perspective, what we want is affordability, so we need to find a way to properly track it. There's a wide variety of ways to lead towards that.
Brad gave a number of different measures of activity in the pipeline that I think would be excellent for tracking volume. Supply will lead to improvements overall, but we need to differentiate that according to different income classes as well, to make sure that we're meeting the affordability targets at a variety of different levels.