15-64 years: 50.4% (male 2,386,428/female 2,816,050)
65 years and over: 2.9% (male 126,351/female 173,219) (2009 est.)
Median age:
total: 16.5 years
male: 15.3 years
female: 17.7 years (2009 est.)
Population growth rate:
2.069% (2009 est.) country comparison to the world: 53
Birth rate:
40.86 births/1,000 population (2009 est.) country comparison to the world: 16