u/AENM1776

Interesting graph. Even though the top marginal tax rates have varied throughout this time period, US revenue has stayed relatively stable.

Additional data can be found at FRED

https://fred.stlouisfed.org/series/FYFRGDA188S

https://taxfoundation.org/research/all/federal/short-history-government-taxing-and-spending-united-states/

This is for the US government.