People who've played until late game : what buildings get built the most frequently in a late tech economy?

I'm trying to do some theorycrafting to figure out which buildings get built most frequently, all else equal, with full tech unlocked, in a "balanced" economy, as I've a feeling this will make it easier to figure out the optimal industries to choose companies for. My guess is that it's power stations, railways, steel mills, tools, motors, and the various resource extraction industries, but I'm not entirely sure.

However I think the best thing is for people to look at some end game files and see what got built the most. If you have a recent save I'd love to get some info.