| Population | 3,944,259 (July 2007 est.) |
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| Age structure | 0-14 years: 21% (male 422,635/female 403,887) 15-64 years: 65.9% (male 1,247,314/female 1,352,139) 65 years and over: 13.1% (male 223,508/female 294,776) (2007 est.) |
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| Median age | total: 35.1 years male: 33.4 years female: 36.8 years (2007 est.) |
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| Population growth rate | 0.393% (2007 est.) |
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| Birth rate | 12.79 births/1,000 population (2007 est.) |
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| Death rate | 7.78 deaths/1,000 population (2007 est.) |
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| Net migration rate | -1.09 migrant(s)/1,000 population (2007 est.) |
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| Sex ratio | at birth: 1.05 male(s)/female under 15 years: 1.046 male(s)/female 15-64 years: 0.922 male(s)/female 65 years and over: 0.758 male(s)/female total population: 0.923 male(s)/female (2007 est.) |
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| Infant mortality rate | total: 7.81 deaths/1,000 live births male: 8.71 deaths/1,000 live births female: 6.86 deaths/1,000 live births (2007 est.) |
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| Life expectancy at birth | total population: 78.54 years male: 74.6 years female: 82.67 years (2007 est.) |
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| Total fertility rate | 1.77 children born/woman (2007 est.) |
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People living with HIV/AIDS | 7,397 (1997) |
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| HIV/AIDS - deaths | NA |
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| Nationality | noun: Puerto Rican(s) (US citizens) adjective: Puerto Rican |
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| Ethnic groups | white (mostly Spanish origin) 80.5%, black 8%, Amerindian 0.4%, Asian 0.2%, mixed and other 10.9% |
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| Religions | Roman Catholic 85%, Protestant and other 15% |
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| Languages | Spanish, English |
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| Literacy | definition: age 15 and over can read and write total population: 94.1% male: 93.9% female: 94.4% (2002 est.) |
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