Bosnia and Herzegovina
males age 16-49: 991,953
females age 16-49: 959,226 (2009 est.)
Botswana
males age 16-49: 341,190
females age 16-49: 315,588 (2009 est.)
Brazil
males age 16-49: 38,043,555
females age 16-49: 44,267,520 (2009 est.)
British Virgin Islands
males age 16-49: 5,979
females age 16-49: 5,738 (2009 est.)
Brunei
males age 16-49: 92,543
females age 16-49: 95,301 (2009 est.)
Bulgaria
males age 16-49: 1,351,312
females age 16-49: 1,381,017 (2009 est.)
Burkina Faso
males age 16-49: 2,197,557
females age 16-49: 2,191,978 (2009 est.)
Burma
males age 16-49: 9,146,312
females age 16-49: 9,520,852 (2009 est.)
Burundi
males age 16-49: 1,124,072
females age 16-49: 1,102,729 (2009 est.)
Cambodia
males age 16-49: 2,673,383
females age 16-49: 2,763,256 (2009 est.)