Asia and Europe are home to some of the world’s oldest populations, those ages 65 and above. At the top is Japan at 28 percent, followed by Italy at 23 percent. Finland, Portugal, and Greece round out the top five at just under 22 percent.
Southern Europe, which includes such countries Croatia, Greece, Italy, Malta, Portugal, Serbia, Slovenia and Spain, is the oldest region in the world with 21 percent of the population ages 65+.
Twelve percent of China’s population is age 65 or above. That share is 16 percent in the United States, 6 percent in India, and 3 percent in Nigeria.
Source: PRB, United Nations