Age structure: 0-14 years: 28% (male 2,673,194; female 2,556,926) 15-64 years: 66% (male 6,126,759; female 6,385,450) 65 years and over: 6% (male 579,329; female 611,900) (July 1998 est.)
Population growth rate: 1.12% (1998 est.)
Birth rate: 18.4 births/1,000 population (1998 est.)
Death rate: 5.96 deaths/1,000 population (1998 est.)
Net migration rate: -1.25 migrant(s)/1,000 population (1998 est.)
Sex ratio: at birth: 1.05 male(s)/female under 15 years: 1.05 male(s)/female 15-64 years: 0.96 male(s)/female 65 years and over: 0.95 male(s)/female (1998 est.)
Infant mortality rate: 16.33 deaths/1,000 live births (1998 est.)
Life expectancy at birth: total population: 72.55 years male: 69.82 years female: 75.41 years (1998 est.)
Total fertility rate: 2.12 children born/woman (1998 est.)
Nationality: noun: Sri Lankan(s) adjective: Sri Lankan