World Population Trends

World Population Trends

Lutz et al 2001

Lutz et al 2001

More Developed Nations

? Age & Sex distribution imply near stable populations

? 16% under age 15 ? 17% over age 65

Fertility rate 1.7 children per woman

Lesser Developed Countries

? 28% under age 15 ? 32% under age 15 excluding China ? 40% under age 15 in least developed countries ? 6% greater than age 65 ? 5% greater than age 65 excluding China ? 4% greater than age 65 in least developed countries ? Fertility rate 2.6 children per woman ? Fertility rate excluding China 3.0 children per woman ? Fertility rate 4.3 children in least developed countries

Population by Age and Sex: 1970 and 2014

World Population (in Billions): 1950-2050

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