I can give you a quick guide based on what our caretaker uses in our place. A big drum of chlorine 100lb last about a year and the winter months takes about 2 cups a week increasing to about a cup every other day in peak summer heat. That cost around 130 bucks i think for the drum.
Likewise with the skiiimers running at this time of year 3 or 4 hours a day is ample but will need to increase the skiimer use in hot weather and plenty of pool usage up to 12 hours a day. Then there is acid, and lime cleaners, tile cleaners, anti algae stuff etc so factoring all this in plus electric i think around 500 to 750 bucks a year would not be too far off the mark. Mind you im talking about on site or DIY self cleaning not contracted out service as that must be more of course.
Salt water pools are cheaper to run but not very common here as the idea of salt water puts people off but the salt content is about 100 time less then the ocean and is barely noticable. The chlorinator then produces chlorine by passing an electric current through the salt water at the pump end which produces chlorine from the salt. The only thing required weekly then is a couple bags of regular refined salt to be added to the pool! The initial cost of these systems is quite a bit more then a standard system but on going costs is a lot cheaper and does not suffer from PH imbalance as often as a regular pool