Bahrain
total: 30.1 years
male: 33.2 years
female: 26.7 years (2009 est.)
Bangladesh
total: 23.3 years
male: 22.9 years
female: 23.5 years (2009 est.)
Barbados
total: 35.8 years
male: 34.7 years
female: 36.9 years (2009 est.)
Belarus
total: 38.6 years
male: 35.6 years
female: 41.6 years (2009 est.)
Belgium
total: 41.7 years
male: 40.4 years
female: 43 years (2009 est.)
Belize
total: 20.4 years
male: 20.3 years
female: 20.6 years (2009 est.)
Benin
total: 17.2 years
male: 16.8 years
female: 17.7 years (2009 est.)
Bermuda
total: 41.3 years
male: 39.9 years
female: 42.7 years (2009 est.)
Bhutan
total: 23.9 years
male: 24.5 years
female: 23.3 years (2009 est.)
Bolivia
total: 21.9 years
male: 21.3 years
female: 22.6 years (2009 est.)