Crude starting point from ChatGPT:

  U.S. Corporate Tax Revenue as a Percentage of GDP (1900–2020s)
  Decade Corporate Tax Revenue as % of GDP
  1900s ~0.1%
  1910s ~0.5%
  1920s ~0.8%
  1930s ~1.0%
  1940s ~4.0%
  1950s ~4.3%
  1960s ~3.5%
  1970s ~3.0%
  1980s ~2.5%
  1990s ~2.5%
  2000s ~1.3%
  2010s ~1.0%
  2020s (est.) ~1.0% (varies slightly)

  U.S. Individual Income Tax Revenue as a Percentage of GDP (1900-2020s)
  Decade Income Tax Revenue as % of GDP
  1900s ~0.0%
  1910s ~0.5%
  1920s ~1.5%
  1930s ~3.5%
  1940s ~7.5%
  1950s ~8.0%
  1960s ~8.0%
  1970s ~8.5%
  1980s ~8.0%
  1990s ~8.0%
  2000s ~8.5%
  2010s ~8.0%
  2020s (est.) ~8.0% (varies slightly)