Age structure:
0-14 years: 46.3% (male 1,884,825/female 1,863,200)
15-64 years: 51.1% (male 2,051,451/female 2,082,017)
65 years and over: 2.6% (male 83,432/female 125,143) (2006 est.)
Median age:
total: 16.6 years
male: 16.4 years
female: 16.9 years (2006 est.)
Population growth rate:
3.7% (2006 est.)
Birth rate:
42.22 births/1,000 population (2006 est.)
Death rate:
13.46 deaths/1,000 population (2006 est.)
Net migration rate:
8.22 migrant(s)/1,000 population (2006 est.)
Sex ratio:
at birth: 1.03 male(s)/female
under 15 years: 1.01 male(s)/female
15-64 years: 0.99 male(s)/female
65 years and over: 0.67 male(s)/female
total population: 0.99 male(s)/female (2006 est.)
Infant mortality rate:
total: 63.13 deaths/1,000 live births
male: 70.26 deaths/1,000 live births
female: 55.79 deaths/1,000 live births (2006 est.)
Life expectancy at birth:
total population: 50.81 years
male: 50.07 years
female: 51.58 years (2006 est.)
Total fertility rate:
6.55 children born/woman (2006 est.)