The Copyright Board establishes the royalties. They've established that the rate will grow, and it has grown, and it has tripled. As far as we know, the repertoires haven't actually changed in size at all. I don't feel qualified to speak about your repertoires. Our understanding is that the board sets the rates, and the way they've established the rates, they've tripled.
On March 1st, 2012. See this statement in context.