United States
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.)
Uruguay
at birth: 1.04 male(s)/female
under 15 years: 1.03 male(s)/female
15-64 years: 0.98 male(s)/female
65 years and over: 0.69 male(s)/female
total population: 0.95 male(s)/female (2006 est.)
Uzbekistan
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 0.98 male(s)/female
65 years and over: 0.69 male(s)/female
total population: 0.98 male(s)/female (2006 est.)
Vanuatu
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1.04 male(s)/female
65 years and over: 1.1 male(s)/female
total population: 1.05 male(s)/female (2006 est.)
Venezuela
at birth: 1.08 male(s)/female
under 15 years: 1.07 male(s)/female
15-64 years: 1.01 male(s)/female
65 years and over: 0.83 male(s)/female
total population: 1.02 male(s)/female (2006 est.)
Vietnam
at birth: 1.07 male(s)/female
under 15 years: 1.08 male(s)/female
15-64 years: 0.98 male(s)/female
65 years and over: 0.64 male(s)/female
total population: 0.98 male(s)/female (2006 est.)
Virgin Islands
at birth: 1.06 male(s)/female
under 15 years: 1.02 male(s)/female
15-64 years: 0.9 male(s)/female
65 years and over: 0.79 male(s)/female
total population: 0.91 male(s)/female (2006 est.)
West Bank
at birth: 1.06 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 1.05 male(s)/female
65 years and over: 0.74 male(s)/female
total population: 1.04 male(s)/female (2006 est.)
Western Sahara
NA
World
at birth: 1.06 male(s)/female
under 15 years: 1.06 male(s)/female
15-64 years: 1.03 male(s)/female
65 years and over: 0.79 male(s)/female
total population: 1.01 male(s)/female (2006 est.)