I don't really know how this data is useful, especially if you're younger. Because the group is so big when you're young it brings the average down, because th

I don't really know how this data is useful, especially if you're younger. Because the group is so big when you're young it brings the average down, because the average is meaningless without showing the standard deviations. In other words this data gets more accurate as you get older and your cohort dies off. There are better calculators that ask you questions about your wealth and lifestyle, and then use this same data as a starting point and then the answers to the questions as modifiers. Those seem far more accurate (and are closer to what actuaries use). Honestly, the best predictor of when you might die of natural causes is your life insurance company, who only makes money if they get it right most of the time and have an incentive to have good tables!