Bahrain
males age 16-49: 171,004
females age 16-49: 144,555 (2009 est.)
Bangladesh
males age 16-49: 24,946,041
females age 16-49: 31,409,069 (2009 est.)
Barbados
males age 16-49: 58,596
females age 16-49: 58,866 (2009 est.)
Belarus
males age 16-49: 1,720,049
females age 16-49: 2,069,898 (2009 est.)
Belgium
males age 16-49: 1,962,409
females age 16-49: 1,905,178 (2009 est.)
Belize
males age 16-49: 56,135
females age 16-49: 54,732 (2009 est.)
Benin
males age 16-49: 1,279,053
females age 16-49: 1,292,438 (2009 est.)
Bermuda
males age 16-49: 12,496
females age 16-49: 12,486 (2009 est.)
Bhutan
males age 16-49: 150,210
females age 16-49: 135,991 (2009 est.)
Bolivia
males age 16-49: 1,666,697
females age 16-49: 1,906,396 (2009 est.)