| Population | 40,448,191 (July 2007 est.) |
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| Age structure | 0-14 years: 14.4% (male 3,005,818/female 2,826,805) 15-64 years: 67.8% (male 13,758,869/female 13,661,295) 65 years and over: 17.8% (male 3,002,585/female 4,192,819) (2007 est.) |
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| Median age | total: 40.3 years male: 39 years female: 41.7 years (2007 est.) |
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| Population growth rate | 0.116% (2007 est.) |
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| Birth rate | 9.98 births/1,000 population (2007 est.) |
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| Death rate | 9.81 deaths/1,000 population (2007 est.) |
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| Net migration rate | 0.99 migrant(s)/1,000 population (2007 est.) |
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| Sex ratio | at birth: 1.07 male(s)/female under 15 years: 1.063 male(s)/female 15-64 years: 1.007 male(s)/female 65 years and over: 0.716 male(s)/female total population: 0.956 male(s)/female (2007 est.) |
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| Infant mortality rate | total: 4.31 deaths/1,000 live births male: 4.7 deaths/1,000 live births female: 3.9 deaths/1,000 live births (2007 est.) |
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| Life expectancy at birth | total population: 79.78 years male: 76.46 years female: 83.32 years (2007 est.) |
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| Total fertility rate | 1.29 children born/woman (2007 est.) |
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People living with HIV/AIDS | 140,000 (2001 est.) |
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| HIV/AIDS - deaths | less than 1,000 (2003 est.) |
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| Nationality | noun: Spaniard(s) adjective: Spanish |
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| Ethnic groups | composite of Mediterranean and Nordic types |
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| Religions | Roman Catholic 94%, other 6% |
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| Languages | Castilian Spanish (official) 74%, Catalan 17%, Galician 7%, Basque 2%, are official regionally |
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| Literacy | definition: age 15 and over can read and write total population: 97.9% male: 98.7% female: 97.2% (2003 est.) |
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