World life expectancy for males is around 71 years. If you offset the first 18 years you get a midpoint at 44.5 years old, which is a lot closer to 40 than it

World life expectancy for males is around 71 years. If you offset the first 18 years you get a midpoint at 44.5 years old, which is a lot closer to 40 than it is to 68.