I would love to see chronological data about how this has evolved over the past decade. It would be especially interesting to see if the grey and red dots are

I would love to see chronological data about how this has evolved over the past decade. It would be especially interesting to see if the grey and red dots are gradually disappearing or if the alternative methods are just an addition to serve an increasing energy demand. Additionally, it's heavenly to see that the single biggest dot on the map is Hydro, the Grand Coulee Dam in the state of Washington.