Maybe this will help in some way: https://steemit.com/hive-130095/@steem.history/steem-effective-steem-power-list-11-23 ?

It is possible to compare with the same list, say, for May. Yes, it's only the 150 strongest accounts including upvu, tipu and other bots. But if we throw out of this list known bots, as well as SC and booming, we can assume that this is a representative sample.