What is the average return of the S&P 500 last 100 years?

I'm curious, what kind of returns has the S&P 500 generated over the past century? Have investors generally seen positive gains, or has it been more of a rollercoaster ride? I'm interested in understanding the historical performance of this widely-tracked index, as it could provide valuable insights into the potential for future returns. Specifically, what is the average annual return of the S&P 500 over the last 100 years, and how does this compare to other investment options?