| Population | 49,044,790 (July 2007 est.) |
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| Age structure | 0-14 years: 18.3% (male 4,714,103/female 4,262,873) 15-64 years: 72.1% (male 18,004,719/female 17,346,594) 65 years and over: 9.6% (male 1,921,803/female 2,794,698) (2007 est.) |
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| Median age | total: 35.8 years male: 34.8 years female: 36.8 years (2007 est.) |
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| Population growth rate | 0.394% (2007 est.) |
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| Birth rate | 9.93 births/1,000 population (2007 est.) |
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| Death rate | 5.99 deaths/1,000 population (2007 est.) |
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| Net migration rate | 0 migrant(s)/1,000 population (2007 est.) |
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| Sex ratio | at birth: 1.08 male(s)/female under 15 years: 1.106 male(s)/female 15-64 years: 1.038 male(s)/female 65 years and over: 0.688 male(s)/female total population: 1.01 male(s)/female (2007 est.) |
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| Infant mortality rate | total: 6.05 deaths/1,000 live births male: 6.43 deaths/1,000 live births female: 5.64 deaths/1,000 live births (2007 est.) |
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| Life expectancy at birth | total population: 77.23 years male: 73.81 years female: 80.93 years (2007 est.) |
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| Total fertility rate | 1.28 children born/woman (2007 est.) |
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People living with HIV/AIDS | 8,300 (2003 est.) |
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| HIV/AIDS - deaths | less than 200 (2003 est.) |
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| Nationality | noun: Korean(s) adjective: Korean |
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| Ethnic groups | homogeneous (except for about 20,000 Chinese) |
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| Religions | Christian 26.3% (Protestant 19.7%, Roman Catholic 6.6%), Buddhist 23.2%, other or unknown 1.3%, none 49.3% (1995 census) |
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| Languages | Korean, English widely taught in junior high and high school |
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| Literacy | definition: age 15 and over can read and write total population: 97.9% male: 99.2% female: 96.6% (2002) |
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