Yeah, I was just trying to figure out how the data works. Like is the first cluster made up of the oldest data points and then basically a bunch of years get clustered there, then they jump a bit and they cluster there and so on 5 times. Or do we see some years at random clustering around 5 main regions with the latest years at the very top.

When I clicked in the link there’s a waterfall chart showing that it sort of has eschalons so it’s clustering at 5 increasing steps. Not 100% sure, but I think that’s what it is. So I wonder if each of the 5 jumps are connected to new tech or energy policy changes.