Age structure: 0-14 years: 25% (male 485,782; female 463,226) 15-64 years: 65% (male 1,192,306; female 1,298,256) 65 years and over : 10% (male 170,170; female 218,766) (July 1997 est.)
Population growth rate: 0.93% (1997 est.)
Birth rate: 17.21 births/1,000 population (1997 est.)
Death rate: 7.87 deaths/1,000 population (1997 est.)
Net migration rate: 0 migrant(s)/1,000 population (1997 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: 0.78 male(s)/female total population: 0.93 male(s)/female (1997 est.)
Infant mortality rate: 11.2 deaths/1,000 live births (1997 est.)
Life expectancy at birth: total population: 74.49 years male : 70.04 years female: 79.22 years (1997 est.)
Total fertility rate: 2.08 children born/woman (1997 est.)
Nationality: noun: Puerto Rican(s) (US citizens) adjective: Puerto Rican