Population: 3,887,652 (July 1999 est.)

Age structure:
0-14 years: 24% (male 482,111; female 459,940)
15-64 years: 65% (male 1,220,682; female 1,323,787)
65 years and over: 11% (male 173,133; female 227,999) (1999 est.)

Population growth rate: 0.59% (1999 est.)

Birth rate: 15.9 births/1,000 population (1999 est.)

Death rate: 7.87 deaths/1,000 population (1999 est.)

Net migration rate: -2.15 migrant(s)/1,000 population (1999 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: 0.76 male(s)/female
total population: 0.93 male(s)/female (1999 est.)

Infant mortality rate: 10.79 deaths/1,000 live births (1999 est.)

Life expectancy at birth:
total population: 75.06 years
male: 70.95 years
female: 79.41 years (1999 est.)

Total fertility rate: 1.94 children born/woman (1999 est.)

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

Ethnic groups: Hispanic

Religions: Roman Catholic 85%, Protestant denominations 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.)