Population: 20,785,955 (July 1998 est.) note: includes 5,244,058 non-nationals (July 1998 est.)
Age structure: 0-14 years: 43% (male 4,547,971; female 4,398,628) 15-64 years: 55% (male 6,738,820; female 4,591,477) 65 years and over: 2% (male 268,136; female 240,923) (July 1998 est.)
Population growth rate: 3.41% (1998 est.)
Birth rate: 37.63 births/1,000 population (1998 est.)
Death rate: 5.02 deaths/1,000 population (1998 est.)
Net migration rate: 1.44 migrant(s)/1,000 population (1998 est.)
Sex ratio: at birth: 1.05 male(s)/female under 15 years: 1.03 male(s)/female 15-64 years: 1.46 male(s)/female 65 years and over: 1.11 male(s)/female (1998 est.)
Infant mortality rate: 41.34 deaths/1,000 live births (1998 est.)
Life expectancy at birth: total population: 70.03 years male: 68.19 years female: 71.96 years (1998 est.)
Total fertility rate: 6.38 children born/woman (1998 est.)