It is not an easy answer, and not because I don't want to answer. A lot of times airport charges in different parts of the world are based on different premises.
It may be best for me to explain how we set up our airport charges. We try to set it based on the costs to deliver our services to the airlines: the capital costs, financing costs, and operating costs.
To make members aware, over the last seven years, we have lowered our aeronautical charge by almost 30%. In 2013, we again dropped our aeronautical charge by another 10%, and we committed to the carriers that we'll hold that steady for a three-year period. They have certainty. They know what it costs them to fly to Pearson Airport, and with that they can make their plans accordingly for the route they want to do.