Averages are misleading by nature. The graphs illustrate that. Must also use “median” as well as the “mean”
Also be aware that the graph is a factually incorrect depiction of income. Towards the right end, up to about 80% it’s right, but the income curve takes a hockey-stick jump somewhere in the 90’s. At 95% the real curve is off this chart, and at 98% it’s well off the top of your computer screen.