lifespan， Standard and Poor\'s 500 Index，1965 to 2030,

Average company lifespan on Standard and Poor's 500 Index from 1965 to 2030, in years

https://www.statista.com/statistics/1259275/average-company-lifespan/#:~:text=In%202020%2C%20the%20average%20lifespan,even%20further%20throughout%20the%202020s.