Geography - note: world's third-largest country (after Russia and
Canada)
United States People
Population: 278,058,881 (July 2001 est.)
Age structure: 0-14 years: 21.12% (male 30,034,674; female 28,681,253)
15-64 years: 66.27% (male 91,371,753; female 92,907,199)
65 years and over: 12.61% (male 14,608,948; female 20,455,054) (2001 est.)
Population growth rate: 0.9% (2001 est.)
Birth rate: 14.2 births/1,000 population (2001 est.)
Death rate: 8.7 deaths/1,000 population (2001 est.)
Net migration rate: 3.5 migrant(s)/1,000 population (2001 est.)