4/24/2104 – The Aging World: The world’s oldest populations, mapped

In a recent Simpsons episode, a Japanese tourist moves in with Comic Book Guy, infuriating her father, who exclaims: “Daughter, you are coming back to Japan; there are 87 old people who need you to take care of them!”

Japan’s exceptionally old population—23 percent of it is 65 or older, the largest percentage in the world and almost twice the U.S.’s—may be American joke fodder for now, but we won’t be laughing for long. In the next four decades, the populations of the U.S. and most other developed countries are going to be as old as Japan’s current population, according recent U.N. data.

Read the full article at Slate.