Age structure: 0-14 years: 40% (male 29,815; female 29,307) 15-64 years: 55% (male 40,830; female 41,056) 65 years and over : 5% (male 3,053; female 3,804) (July 1997 est.)
Population growth rate: 2.54% (1997 est.)
Birth rate: 33.77 births/1,000 population (1997 est.)
Death rate: 8.4 deaths/1,000 population (1997 est.)
Net migration rate: 0 migrant(s)/1,000 population (1997 est.)
Sex ratio: at birth : 1.03 male(s)/female under 15 years: 1.02 male(s)/female 15-64 years: 0.99 male(s)/female 65 years and over: 0.8 male(s)/female total population: 0.99 male(s)/female (1997 est.)
Infant mortality rate: 60.2 deaths/1,000 live births (1997 est.)
Life expectancy at birth: total population: 64.09 years male : 62.15 years female: 66.08 years (1997 est.)
Total fertility rate: 4.22 children born/woman (1997 est.)
Nationality: noun: Sao Tomean(s) adjective: Sao Tomean