Retiring in 1965: a 4% withdrawal ran out of money in year 31

Retiring in 1965 with $2M and a 4% inflation-adjusted withdrawal, the money ran out in year 31 (1995). Its worst year was 1974, when the S&P 500 lost 20.7% including dividends. Inflation had pushed the yearly withdrawal from $80K to $385K by then.