I don't know yet, and I know that Charles, working with his team, has not yet come to a conclusion about the number of sites that will remain.
We have made a commitment to maintain the sites in Canada's far north. They were among the earliest sites established around the world. The data from at least one site, if not more sites, was fundamental to the development of the Montreal Protocol. So there is a lot of interest in maintaining that as a baseline measurement, I would say. Other than those sites, we can discuss with scientists whether we need the number of sites we have and a certain frequency. Those are the kinds of discussions that scientists are having now.