Population:
633,441 (July 2009 est.) country comparison to the world: 165
Age structure:
0-14 years: 41.9% (male 134,823/female 130,308)
15-64 years: 54% (male 167,820/female 174,238)
65 years and over: 4.1% (male 11,574/female 14,678) (2009 est.)
Median age:
total: 18.9 years
male: 18.3 years
female: 19.6 years (2009 est.)