Belgium
males age 16-49: 1,998,003 (2005 est.)
Belize
males age 18-49: 41,368 (2005 est.)
Benin
males age 21-49: 670,170
females age 21-49: 630,078 (2005 est.)
Bhutan
males age 18-49: 314,975 (2005 est.)
Bolivia
males age 18-49: 1,311,414 (2005 est.)
Bosnia and Herzegovina
males age 18-49: 829,530 (2005 est.)
Botswana
males age 18-49: 136,322 (2005 est.)
Brazil
males age 19-49: 33,119,098 (2005 est.)
Brunei
males age 18-49: approx. 85,045 (2005 est.)
Bulgaria
males age 18-49: 1,302,037 (2005 est.)