Geography - note:
world's third-largest country by size (after Russia and Canada) and
by population (after China and India); Mt. McKinley is highest point
in North America and Death Valley the lowest point on the continent
People United States
Population:
298,444,215 (July 2006 est.)
Age structure:
0-14 years: 20.4% (male 31,095,847/female 29,715,872)
15-64 years: 67.2% (male 100,022,845/female 100,413,484)
65 years and over: 12.5% (male 15,542,288/female 21,653,879) (2006
est.)
Median age: total: 36.5 years male: 35.1 years female: 37.8 years (2006 est.)
Population growth rate:
0.91% (2006 est.)
Birth rate:
14.14 births/1,000 population (2006 est.)
Death rate:
8.26 deaths/1,000 population (2006 est.)
Net migration rate:
3.18 migrant(s)/1,000 population (2006 est.)
Sex ratio:
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 1 male(s)/female
65 years and over: 0.72 male(s)/female
total population: 0.97 male(s)/female (2006 est.)