Summary of Buffett's 66-Year Investment Career

Earned for 55 years, lost for 11 years

There has only been one instance where the maximum drawdown in a single year exceeded 50%.
There was also one instance where the maximum drawdown in a single year exceeded 30%.
There have been 3 instances of a single year drawdown exceeding 10%.

Ages 27-45: Annual average return rate of 22%
Ages 46-68: Annual average return rate of 42.42%
69-92 years old: annual average return rate 9.58%