Population: 22,396,407 (July 1997 est.)
Age structure: 0-14 years : 34% (male 3,964,886; female 3,720,984) 15-64 years: 61% (male 6,877,890; female 6,838,799) 65 years and over: 5% (male 456,182; female 537,666) (July 1997 est.)
Population growth rate: 1.83% (1997 est.)
Birth rate: 23.67 births/1,000 population (1997 est.)
Death rate: 5.03 deaths/1,000 population (1997 est.)
Net migration rate: -0.32 migrant(s)/1,000 population (1997 est.)
Sex ratio: at birth: 1.07 male(s)/female under 15 years: 1.07 male(s)/female 15-64 years: 1.01 male(s)/female 65 years and over : 0.85 male(s)/female total population: 1.02 male(s)/female (1997 est.)
Infant mortality rate: 28.5 deaths/1,000 live births (1997 est.)
Life expectancy at birth: total population : 72.37 years male: 69.4 years female : 75.58 years (1997 est.)
Total fertility rate: 2.78 children born/woman (1997 est.)