Age structure: 0-14 years: 48% (male 36,127; female 35,253) 15-64 years: 48% (male 34,980; female 37,555) 65 years and over: 4% (male 2,813; female 3,395) (July 1998 est.)
Population growth rate: 3.1% (1998 est.)
Birth rate: 43.48 births/1,000 population (1998 est.)
Death rate: 8.31 deaths/1,000 population (1998 est.)
Net migration rate: -4.15 migrant(s)/1,000 population (1998 est.)
Sex ratio: at birth: 1.03 male(s)/female under 15 years: 1.02 male(s)/female 15-64 years: 0.93 male(s)/female 65 years and over: 0.82 male(s)/female (1998 est.)
Infant mortality rate: 54.55 deaths/1,000 live births (1998 est.)
Life expectancy at birth: total population: 64.34 years male: 62.87 years female: 65.86 years (1998 est.)
Total fertility rate: 6.19 children born/woman (1998 est.)
Nationality: noun: Sao Tomean(s) adjective: Sao Tomean