Population: 3,915,798 (July 2000 est.)

Age structure:
0-14 years: 24% (male 480,100; female 457,684)
15-64 years: 66% (male 1,234,065; female 1,336,848)
65 years and over: 10% (male 174,383; female 232,718) (2000 est.)

Population growth rate: 0.56% (2000 est.)

Birth rate: 15.47 births/1,000 population (2000 est.)

Death rate: 7.74 deaths/1,000 population (2000 est.)

Net migration rate: -2.14 migrant(s)/1,000 population (2000 est.)

Sex ratio:
at birth: 1.06 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 0.92 male(s)/female
65 years and over: 0.75 male(s)/female
total population: 0.93 male(s)/female (2000 est.)

Infant mortality rate: 9.71 deaths/1,000 live births (2000 est.)

Life expectancy at birth:
total population: 75.55 years
male: 71.05 years
female: 80.3 years (2000 est.)

Total fertility rate: 1.9 children born/woman (2000 est.)

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

Ethnic groups: NA

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

Languages: Spanish, English

Literacy:
definition: age 15 and over can read and write
total population: 89%
male: 90%
female: 88% (1980 est.)