Age structure:
0-14 years: 35.5% (male 1,767,310/female 1,701,744)
15-64 years: 60% (male 2,877,605/female 2,992,043)
65 years and over: 4.5% (male 193,196/female 243,348) (2009 est.)
Median age:
total: 21.9 years
male: 21.3 years
female: 22.6 years (2009 est.)
Population growth rate:
1.772% (2009 est.) country comparison to the world: 74