Greg, i think it's a simple matter of the time it takes something to get out into the industry. LEED-EBOM was launched in 2004—by contrast, LEED-NC 2.0 came out in 2000. LEED was also developed more with new office buildings in mind, so it has taken a few years for the mindset to switch to one where O&M is perceived as having central importance to meeting environmental imperatives. Fortunately, that's now a reality, with LEED-EBOM registered square footage outpacing NC. The trend is clear: green O&M matters, and we all have a lot of work to do.