The graph title really should include more details than just "pay". Based on the site linked in the github page's readme, it's graphing "Median weekly earnings

The graph title really should include more details than just "pay". Based on the site linked in the github page's readme, it's graphing "Median weekly earnings of full-time wage and salary workers by detailed occupation and sex". That kind of detail is important because these numbers are de-facto controversial (in that people argue angrily over them a lot).