Population pyramids: World
Below population pyramids for the world with 25 year intervals from 1950 onwards. These show the distribution of age groups (5 years each, except the 80+ group, which extends to the oldest amongst us) within the total population of the world. To the left the males, and to the right the women. How wider a horizontal bar, the more people it represents (hovering over/clicking it provides a detailed number).
Where in 1950 one can see a pyramid broad at the base and tiny at the top, the final one for 2100 show a base that is less broad than most of the higher age groups and where the 80+ category is very broad (please take into account that this group also contains the people over 100 and even 110! In this case the group older than 100 has an estimated total of 20,109,155 people (M+F)).