Benin
males age 21-49: 1,295,230
females age 21-49: 1,301,936 (2005 est.)
Bermuda
males age 18-49: 15,151 (2005 est.)
Bhutan
males age 18-49: 483,860
females age 18-49: 453,683 (2005 est.)
Bolivia
males age 18-49: 1,923,234
females age 18-49: 2,007,315 (2005 est.)
Bosnia and Herzegovina
males age 18-49: 1,119,508
females age 18-49: 1,079,435 (2005 est.)
Botswana
males age 18-49: 350,649
females age 18-49: 361,642 (2005 est.)
Brazil
males age 19-49: 45,586,036
females age 19-49: 45,728,704 (2005 est.)
British Virgin Islands
males age 18-49: 6,410 (2005 est.)
Brunei
males age 18-49: 103,885
females age 18-49: 93,024 (2005 est.)
Bulgaria
males age 18-49: 1,661,211
females age 18-49: 1,660,982 (2005 est.)