The rates of the tariffs are set by the Copyright Board, and they're almost constantly appealed.
Prior to the tariff system, the fee was around $2.50 for a full-time student equivalent. The Copyright Board set a tariff that was $5 and pennies. It ended up at $4.81 when the appeals were exhausted. There are four million students, so it's four million times $5. You can do the math.
That was the case that the ministers of education took to the Supreme Court of Canada, and the decision was that short excerpts could be copied by teachers without paying copyright royalties. Then, in 2013, based on that decision, the ministers of education stopped paying the tariff, and decided to rely on fair dealing and licences, databases and repositories, and other things to meet their copying needs.
That's the range.