https://steemit.com/steem/@alexgr/the-ideal-of-fair-distribution-in-cryptocurrencies-and-steem-can-it-exist-in-real-life

I have the reference in the end, it's the pyramid of wealth:

first 41% of the wealth at 0.7% of the population
next 42.3% of the wealth at 7.7% of the population

So 8.4% of the population have 83.3% of wealth