Aging is no longer the sole province of more developed countries. Longer life expectancy at birth and lower fertility have sharply increased the proportion of elderly in less developed countries. In 1950, 4 percent of the population in less developed countries was ages 65+. Today, that proportion has risen to nearly 6 percent but is projected to reach nearly 15 percent by mid-century. At the same, the 0-4 population would reach a peak of about 585 million around 2015 and then decline. In more developed countries, the number of children in the 0-4 age group was 82 million in 1950 but that number has been declining since the 1970s and is expected to decrease to 65 million by 2050. The proportion 65+, which was 8 percent in 1950, has increased to 16 percent today and will most likely increase to a record 26 percent by 2050.