How to Know the Average Lifespan of Indians in the Vedic Period

There are two ways of determining the life span average lifespan of people during a certain era One way is to have actual census data So that you know The the ages of various people For that you need detailed statistics Of of the entire population. The other way Is to a to have archaeological evidence of of burials. If you can find a large number of skeletons Of dead people from that era then you can To a large degree of confidence determine the average lifespan of the people of that era, but only if you have Access to such skeletons.