Age structure: 0-14 years: 37% (male 483,795; female 468,700) 15-64 years: 59% (male 764,665; female 764,825) 65 years and over: 4% (male 41,488; female 55,057) (July 1998 est.)
Population growth rate: 1.54% (1998 est.)
Birth rate: 23.56 births/1,000 population (1998 est.)
Death rate: 8.19 deaths/1,000 population (1998 est.)
Net migration rate: 0 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 male(s)/female 65 years and over: 0.75 male(s)/female (1998 est.)
Infant mortality rate: 66.34 deaths/1,000 live births (1998 est.)
Life expectancy at birth: total population: 61.46 years male: 59.4 years female: 63.61 years (1998 est.)
Total fertility rate: 2.75 children born/woman (1998 est.)
Nationality: noun: Mongolian(s) adjective: Mongolian