Samoa
males age 16-49: 43,169
females age 16-49: 40,957 (2009 est.)
San Marino
males age 16-49: 5,343
females age 16-49: 6,048 (2009 est.)
Sao Tome and Principe
males age 16-49: 35,216
females age 16-49: 38,329 (2009 est.)
Saudi Arabia
males age 16-49: 7,486,622
females age 16-49: 5,652,819 (2009 est.)
Senegal
males age 16-49: 2,038,508
females age 16-49: 2,207,510 (2009 est.)
Serbia
males age 16-49: 1,415,007
females age 16-49: 1,379,541 (2009 est.)
Seychelles
males age 16-49: 19,702
females age 16-49: 19,780 (2009 est.)
Sierra Leone
males age 16-49: 692,469
females age 16-49: 762,239 (2009 est.)
Singapore
males age 16-49: 1,033,961
females age 16-49: 1,104,952 (2009 est.)
Slovakia
males age 16-49: 1,165,470
females age 16-49: 1,152,941 (2009 est.)