Or I'm just not informed. I can admit that. I'm honestly surprised about that 43% number, but it does appear to be pretty close if not exactly right (
source). I would have guessed it would have been closer to 10-15% with coal being a lot higher.
Another question, that I honestly don't have an answer to. Do electrical rates actually fluctuate that much? When I get my electrical bill, I've never noticed rate changes. It's quite possible it's because I've never looked closely. (juxtaposed to gas prices, which we all see changing daily/weekly) As far as I know, my electrical rates have been very steady over the past 10-15 years.