According to United Nations projections, by 2030 the population of the United States will include about 34 people aged 65 or over for each 100 people in the 20-64 age range; for the Euro area and Japan, the analogous numbers in 2030 will be 46 and 57, respectively.
Over the remainder of the century, the populations of other major industrial countries will age much more quickly than that of the United States.