Ageing Populations: A Slow-Burning Fuse

"The rich world’s population is ageing fast, and the poor world is only a few decades behind. According to the UN’s latest biennial population forecast, the median age for all countries is due to rise from 29 now to 38 by 2050. At present just under 11% of the world’s 6.9 billion people are over 60. Taking the UN’s central forecast, by 2050 that share will have risen to 22% (of a population of over 9 billion), and in the developed countries to 33% (see chart 2). To put it another way, in the rich world one person in three will be a pensioner; nearly one in ten will be over 80."