Age structure:
0-14 years: 38.1% (male 1,735,917/female 1,704,383)
15-64 years: 58.5% (male 2,621,059/female 2,665,447)
65 years and over: 3.4% (male 120,040/female 188,690) (2009 est.)
Median age:
total: 20.2 years
male: 19.8 years
female: 20.7 years (2009 est.)
Population growth rate:
1.838% (2009 est.) country comparison to the world: 70