Seattle is nearer 14c (13.75) and likely to increase over the next decade (because of nonsense like[1]).
[1]: This alone will increase costs by something like 4c/kWh from these 70 year old dams: https://www.king5.com/article/news/investigations/skagit-riv...
Seattle now has variable rate. I pull most of my power at night, when it's 8c/kWh.