San Marino
males age 18-49: 5,107 (2005 est.)
Sao Tome and Principe
males age 18-49: 25,950
females age 18-49: 28,660 (2005 est.)
Saudi Arabia
males age 18-49: 6,592,709
females age 18-49: 4,659,347 (2005 est.)
Senegal
males age 18-49: 1,558,175
females age 18-49: 1,642,533 (2005 est.)
Seychelles
males age 18-49: 16,122
females age 18-49: 18,777 (2005 est.)
Sierra Leone
males age 18-49: 539,697 (2005 est.)
Singapore
males age 18-49: 982,368 (2005 est.)
Slovakia
males age 18-49: 1,089,645
females age 18-49: 1,093,077 (2005 est.)
Slovenia
males age 17-49: 405,593
females age 17-49: 397,167 (2005 est.)
Solomon Islands
males age 18-49: 92,796 (2005 est.)