Belarus
total: 36.9 years
male: 34.2 years
female: 39.5 years (2004 est.)

Belgium
total: 40.2 years
male: 38.9 years
female: 41.5 years (2004 est.)

Belize
total: 19.1 years
male: 19 years
female: 19.3 years (2004 est.)

Benin
total: 16.5 years
male: 16 years
female: 16.9 years (2004 est.)

Bermuda
total: 39.2 years
male: 38.3 years
female: 40.1 years (2004 est.)

Bhutan
total: 20.2 years
male: 20 years
female: 20.3 years (2004 est.)

Bolivia
total: 21.1 years
male: 20.4 years
female: 21.8 years (2004 est.)

Bosnia and Herzegovina
total: 35.9 years
male: 35.5 years
female: 36.2 years (2004 est.)

Botswana
total: 19.2 years
male: 18.5 years
female: 19.9 years (2004 est.)

Brazil
total: 27.4 years
male: 26.7 years
female: 28.2 years (2004 est.)

British Virgin Islands
total: 30.9 years
male: 31.1 years
female: 30.7 years (2004 est.)

Brunei
total: 26.7 years
male: 27.3 years
female: 26 years (2004 est.)

Bulgaria
total: 40.5 years
male: 38.4 years
female: 42.4 years (2004 est.)

Burkina Faso
total: 16.8 years
male: 16.4 years
female: 17.2 years (2004 est.)

Burma
total: 25.7 years
male: 25.2 years
female: 26.3 years (2004 est.)

Burundi
total: 16.5 years
male: 16.1 years
female: 16.8 years (2004 est.)

Cambodia
total: 19.5 years
male: 18.8 years
female: 20.4 years (2004 est.)

Cameroon
total: 18.5 years
male: 18.3 years
female: 18.6 years (2004 est.)

Canada
total: 38.2 years
male: 37.2 years
female: 39.2 years (2004 est.)

Cape Verde
total: 19 years
male: 18.2 years
female: 19.9 years (2004 est.)

Cayman Islands
total: 36.5 years
male: 36.2 years
female: 36.8 years (2004 est.)

Central African Republic
total: 18 years
male: 17.7 years
female: 18.4 years (2004 est.)

Chad
total: 16 years
male: 15.3 years
female: 16.7 years (2004 est.)

Chile
total: 29.8 years
male: 28.9 years
female: 30.7 years (2004 est.)

China
total: 31.8 years
male: 31.5 years
female: 32.2 years (2004 est.)

Colombia
total: 25.8 years
male: 24.9 years
female: 26.7 years (2004 est.)

Comoros
total: 18.6 years
male: 18.3 years
female: 18.9 years (2004 est.)

Congo, Democratic Republic of the
total: 15.8 years
male: 15.4 years
female: 16.2 years (2004 est.)

Congo, Republic of the
tot