The formula by which we apply the subsidies took into account in the base year the lowest shipping rate for each community of the three biggest providers. From that we took into account a small variation, to take into account, over and above transportation, the higher cost of operating and providing retail establishments in the community. That determined the general approach to setting the initial rates. We then increased those rates the year following, and those rates haven't been adjusted since.
On March 23rd, 2015. See this statement in context.