Fig. 2: Scenario uncertainty in future elderly population growth.

Projected changes (presented as a ratio, relative to 2020) in the global population aged over 65 years (horizontal axis) and 85 years (vertical axis) for each decade between 2020 and 2100 under three Shared Socioeconomic Pathways and the median population scenario developed for the UN World Population Prospects 2019. Each circle denotes a new decade; larger filled circles show the values for 2100.