Barbados
total: 34.6 years
male: 33.4 years
female: 35.6 years (2006 est.)
Belarus
total: 37.2 years
male: 34.5 years
female: 39.9 years (2006 est.)
Belgium
total: 40.9 years
male: 39.6 years
female: 42.1 years (2006 est.)
Belize
total: 19.6 years
male: 19.5 years
female: 19.8 years (2006 est.)
Benin
total: 17.6 years
male: 17.2 years
female: 18 years (2006 est.)
Bermuda
total: 40.2 years
male: 39.3 years
female: 41 years (2006 est.)
Bhutan
total: 20.4 years
male: 20.2 years
female: 20.6 years (2006 est.)
Bolivia
total: 21.8 years
male: 21.2 years
female: 22.5 years (2006 est.)
Bosnia and Herzegovina
total: 38.4 years
male: 37.2 years
female: 39.5 years (2006 est.)
Botswana
total: 19.4 years
male: 18.8 years
female: 20 years (2006 est.)