Population:
3,966,213 (July 2009 est.)

Age structure:
0-14 years: 19.9% (male 404,635/female 386,733)
15-64 years: 66% (male 1,260,114/female 1,361,193)
65 years and over: 14.1% (male 240,318/female 318,027) (2009 est.)

Median age:
total: 36.2 years
male: 34.5 years
female: 37.9 years (2009 est.)

Population growth rate:
0.298% (2009 est.)

Birth rate:
11.72 births/1,000 population (2009 est.)

Death rate:
7.78 deaths/1,000 population (July 2009 est.)

Net migration rate:
-0.96 migrant(s)/1,000 population (2009 est.)

Urbanization:
urban population: 98% of total population (2008)
rate of urbanization: 0.8% annual rate of change (2005-10 est.)

Sex ratio:
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 0.93 male(s)/female
65 years and over: 0.76 male(s)/female
total population: 0.92 male(s)/female (2009 est.)

Infant mortality rate:
total: 8.28 deaths/1,000 live births
male: 9.14 deaths/1,000 live births
female: 7.37 deaths/1,000 live births (2009 est.)

Life expectancy at birth:
total population: 78.52 years
male: 74.86 years
female: 82.36 years (2009 est.)

Total fertility rate:
1.65 children born/woman (2009 est.)

HIV/AIDS - adult prevalence rate:
NA

HIV/AIDS - people living with HIV/AIDS:
7,397 (1997)

HIV/AIDS - deaths:
NA

Nationality:
noun: Puerto Rican(s) (US citizens)
adjective: Puerto Rican

Ethnic groups:
white (mostly Spanish origin) 76.2%, black 6.9%, Asian 0.3%, Amerindian 0.2%, mixed 4.4%, other 12% (2007)

Religions:
Roman Catholic 85%, Protestant and other 15%

Languages:
Spanish, English

Literacy:
definition: age 15 and over can read and write
total population: 94.1%
male: 93.9%
female: 94.4% (2002 est.)

Education expenditures:
NA