A figure that I've seen bandied about is that there are 17 states that have already adopted rules based on some portion of the CARB advanced clean transportation rules, and that those states represent I think 35% of the population and 50% of the economic activity in the US. That is less definitive than saying that all of these states will adopt the same rules (like the most recent Advanced Clean Fleets rule). But it's still enough that fleet operators, government procurement officers, and vehicle manufacturers are investing in zero emission vehicles and infrastructure faster than they would without those regulations.