Also, it doesn't really show well how in some states, like MN coal went from around 50% to 25% over that time frame. Yes, still biggest other than the one blip, but not as big as it was by a significant margin.

Yeah, visually the size might represent the value in inches, but it could just be the ranked position. Feels like they missed the mark, sized by inches and displaying inches would be a pretty neat visual, they were so close...