According to the United Nations Population Division, Asia, particularly countries like South Korea, Japan, and Hong Kong, leads the world in having the oldest populations.

After the UN observed World Day of Social Justice on February 20, Felix Richter of Statista examines one of the major issues the world will confront in the ensuing decades: the slow but mostly irreversible population change. The United Nations Population Division projects that the number of people 65 and older will dou...