Methodology note: The above series show the evolution of the shares of the current living generations over the total population. The series were elaborated using total world population data, (both sexes combined) by single age, region, subregion and country, annually for 1950-2100 (thousands) from the World Population Prospects 2019. The generations are defined by the period in which their individuals were born. The difference between a year and the limit-years defining the generations provides different age groups, which can be aggregated according to each generation’s period. These aggregations over total population provide the generations’ shares over time.