Population Distribution

Components of Population Change

Population Composition

World Population Trends



The general declines in birth and death rates have led to the rapid aging of the world population as a whole. The percentage of the world population age 60 and older increased from 8 percent in 1950 to 12 percent in 2013. The aging of the population is particularly advanced in the more developed countries, where the number of people age 60 or older has already surpassed the number of children under age 15.


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Infant Mortality

Life Expectancy

Trends in the United States

Additional Reading