I'm been searching the net for a while now but I can't find what I'm looking for. I'm not even sure that what I'm looking for even exists. Is there such a thing as a graph showing life expectancy as a probability distribution? You know the kind of thing, with age along the x-axis and the probability of dying at that age on the y-axis, with the total area beneath the curve equal to 1. I'd be interested to see how these curves have changed since mortality records began, and also the difference between the curves by sex and by country.