Bahrain
males age 18-49: 6,013
females age 18-49: 5,852 (2005 est.)
Belarus
males age 18-49: 85,202
females age 18-49: 82,037 (2005 est.)
Belgium
males age 18-49: 64,263
females age 16-49: 61,402 (2005 est.)
Belize
males age 18-49: 3,213
females age 18-49: 3,100 (2005 est.)
Benin
males age 18-49: 76,661
females: 75,068 (2005 est.)
Bermuda
males age 18-49: 408 (2005 est.)
Bhutan
males age 18-49: 23,939
females age 18-49: 21,979 (2005 est.)
Bolivia
males age 18-49: 101,101
females age 18-49: 98,671 (2005 est.)
Bosnia and Herzegovina
males age 18-49: 32,942
females age 18-49: 31,466 (2005 est.)
Botswana
males age 18-49: 21,103
females age 18-49: 21,379 (2005 est.)