Information on Estimated Monthly Electric Costs in Hawaii

I received the information in this chart from one of the contractors I approached for an estimate on a solar hot water heating system.  The chart he had didn't attribute a source, but I believe he told me he got it from HELCO.  I searched the web for a similar chart, but I couldn't find one.  At any rate, I think it is a helpful starting point when you are analyzing your electrical use and trying to make decisions about how best to conserve energy or investigate alternative energy sources.