I hate this software.
It makes a great point to show that for the very rich they are providing three times more as a percentage to the government in taxes paid now than they were under Eisenhower's 91% tax rate. It is a simple measure to prove that some people like to tell only part of the story.
All that shows is growing income inequality- in that the 0.1% make more as a percentage. It doesn't include anything about taxes...