If you have a look at https://en.wikipedia.org/wiki/List_of_countries_by_median_age https://en.wikipedia.org/wiki/List_of_countries_by_median_ag..., you will se

If you have a look at https://en.wikipedia.org/wiki/List_of_countries_by_median_age https://en.wikipedia.org/wiki/List_of_countries_by_median_ag..., you will see that the total world age median is 29.7.