There's also a summary maintained at Wikipedia https://en.wikipedia.org/wiki/Historical_annual_reformulations_of_the_influenza_vaccine https://en.wikipedia.org

There's also a summary maintained at Wikipedia https://en.wikipedia.org/wiki/Historical_annual_reformulations_of_the_influenza_vaccine https://en.wikipedia.org/wiki/Historical_annual_reformulatio... although it's presumably taken from the same sources you suggest.