That's a good question. There are a couple responses.
In the U.S., at the state level, there are tax incentives for infrastructure to incent companies to go in. In Canada we've been looking at putting in our own stations to service our own fleets. There are a number of natural gas distribution outlets throughout the country, but the numbers have not been high. It will be that chicken-or-egg situation until there are more products and units operating on natural gas; then you'll get industry responding.