I'll just briefly mention, as I was going to say before, that the charge has been adjusted over time. It has been adjusted downwards previously. It's based on the level of traffic. If traffic substantially increases, then it's a flat-rate charge. If traffic goes up substantially, then the revenues will increase. As I mentioned to you, there's a constant review of expenditures and revenues over time. At certain periods of time--I believe on two occasions--the charge was adjusted downward. There are some fluctuations. That is part of the principle of keeping revenues in line with expenditures.
On April 22nd, 2010. See this statement in context.