The 2008 CIA World Factbook

by United States. Central Intelligence Agency

@2177 Median age (years)

Afghanistan
total: 17.6 years
male: 17.6 years
female: 17.6 years (2008 est.)

Albania
total: 29.5 years
male: 28.9 years
female: 30.2 years (2008 est.)

Algeria
total: 26 years
male: 25.8 years
female: 26.2 years (2008 est.)

American Samoa
total: 22.8 years
male: 22.7 years
female: 23 years (2008 est.)

Andorra
total: 38.9 years
male: 39.2 years
female: 38.6 years (2008 est.)

Angola
total: 18 years
male: 18 years
female: 18 years (2008 est.)

Anguilla
total: 32.3 years
male: 31.3 years
female: 33.4 years (2008 est.)

Antigua and Barbuda
total: 29.5 years
male: 28 years
female: 30.8 years (2008 est.)

Argentina
total: 29.7 years
male: 28.8 years
female: 30.8 years (2008 est.)