Swaziland
total: 18.5 years
male: 17.8 years
female: 19.2 years (2006 est.)

Sweden
total: 40.9 years
male: 39.8 years
female: 42 years (2006 est.)

Switzerland
total: 40.1 years
male: 39 years
female: 41.1 years (2006 est.)

Syria
total: 20.7 years
male: 20.6 years
female: 20.9 years (2006 est.)

Taiwan
total: 34.6 years
male: 34.1 years
female: 35 years (2006 est.)

Tajikistan
total: 20 years
male: 19.7 years
female: 20.4 years (2006 est.)

Tanzania
total: 17.7 years
male: 17.5 years
female: 18 years (2006 est.)

Thailand
total: 31.9 years
male: 31.1 years
female: 32.8 years (2006 est.)

Togo
total: 18.3 years
male: 17.8 years
female: 18.7 years (2006 est.)

Tonga
total: 20.7 years
male: 20.1 years
female: 21.3 years (2006 est.)

Trinidad and Tobago
total: 31.2 years
male: 30.8 years
female: 31.7 years (2006 est.)

Tunisia
total: 27.8 years
male: 27.3 years
female: 28.3 years (2006 est.)

Turkey
total: 28.1 years
male: 27.9 years
female: 28.3 years (2006 est.)

Turkmenistan
total: 21.8 years
male: 20.9 years
female: 22.7 years (2006 est.)

Turks and Caicos Islands
total: 27.5 years
male: 28.3 years
female: 26.8 years (2006 est.)

Tuvalu
total: 24.6 years
male: 23.6 years
female: 26 years (2006 est.)

Uganda
total: 15 years
male: 14.9 years
female: 15.1 years (2006 est.)

Ukraine
total: 39.2 years
male: 35.9 years
female: 42.2 years (2006 est.)

United Arab Emirates
total: 28.1 years
male: 34.8 years
female: 23.3 years (2006 est.)

United Kingdom
total: 39.3 years
male: 38.2 years
female: 40.4 years (2006 est.)

United States
total: 36.5 years
male: 35.1 years
female: 37.8 years (2006 est.)

Uruguay
total: 32.7 years
male: 31.3 years
female: 34.2 years (2006 est.)

Uzbekistan
total: 22.7 years
male: 22 years
female: 23.3 years (2006 est.)

Vanuatu
total: 23 years
male: 23 years
female: 23 years (2006 est.)

Venezuela
total: 26 years
male: 25.4 years
female: 26.6 years (2006 est.)

Vietnam
total: 25.9 years
male: 24.8 years
female: 27.1 years (2006 est.)

Virgin Islands
total: 37.1 years
male: 36.2 years
female: 38 years (2006 est.)

West Bank
total: 18.3 years
male: 18.2 years
female: 18.5 years (2006 est.)

World
total: 27.6 years
male: 27 years