(This comment is not exactly responsive to the main question so ignore it if you want.)
Dive rates, similarly have increased yet again. Our favorite dive shop dropped its 6-for-the-price-of-5 dive days discount and raised their base rates. The net effect is a 40% increase in dive cost.
Correction--I just found that our dive shop still does offer the 6 for the price of five dive days special. The just don't advertise it on their new website--at least I can't find. So their prices only went up 18%, not 40%+