Bahrain
males age 18-49: 161,372
females age 18-49: 125,488 (2005 est.)
Bangladesh
males age 18-49: 26,841,255 (2005 est.)
Barbados
males age 18-49: 54,510
females age 18-49: 54,889 (2005 est.)
Belarus
males age 18-49: 1,657,984
females age 18-49: 2,102,793 (2005 est.)
Belgium
males age 16-49: 1,998,003
females age 16-49: 1,940,918 (2005 est.)
Belize
males age 18-49: 44,238
females age 18-49: 43,633 (2005 est.)
Benin
males age 21-49: 749,774
females age 21-49: 751,329 (2005 est.)
Bermuda
males age 18-49: 12,165 (2005 est.)
Bhutan
males age 18-49: 314,975
females age 18-49: 296,833 (2005 est.)
Bolivia
males age 18-49: 1,311,414
females age 18-49: 1,502,177 (2005 est.)