I don't find it surprising that the income level of the bottom 20% has gone up significantly more when Democrats are using the money that others earn, and that the government takes away, to purchase votes and stay in power by handing out money to them, via social welfare programs, like it was candy on Halloween and driving this nation $14 Trillion (plus an additional $107.5 Trillion in unfunded liabilities) into debt in the process.
That and, of course, the use of such a large portion of the X axis in the graph to represent such a small number will intentionally visually distort what the graph represents. The illusions the progressives attempt to create are so much easier to explain than the illusions that even a 3rd rate magician performs.
I, like Goebbels, simply studied the best propaganda texts on the market - the ones the progressives wrote. Maybe this time those tactics can be used for good instead of the evil that they have always been used for in the past.