Sudan
males age 18-49: 8,291,695
females age 18-49: 8,135,683 (2005 est.)
Suriname
males age 18-49: 111,582
females age 18-49: 103,769 (2005 est.)
Swaziland
males age 18-49: 227,617 (2005 est.)
Sweden
males age 19-49: 1,838,427
females age 19-49: 1,774,659 (2005 est.)
Switzerland
males age 19-49: 1,707,694
females age 19-49: 1,662,099 (2005 est.)
Syria
males age 18-49: 4,356,413
females age 18-49: 4,123,339 (2005 est.)
Taiwan
males age 19-49: 5,883,828
females age 19-49: 5,680,773 (2005 est.)
Tajikistan
males age 18-49: 1,556,415
females age 18-49: 1,568,780 (2005 est.)
Tanzania
males age 18-49: 7,422,869 (2005 est.)
Thailand
males age 21-49: 14,903,855
females age 21-49: 15,265,854 (2005 est.)