Senegal
males age 16-49: 3,211,279
females age 16-49: 3,250,128 (2010 est.)
Seychelles
males age 16-49: 26,040
females age 16-49: 23,961 (2010 est.)
Sierra Leone
males age 16-49: 1,156,724 (2010 est.)
Singapore
males age 16-49: 1,266,426 (2010 est.)
Slovakia
males age 16-49: 1,413,079
females age 16-49: 1,377,754 (2010 est.)
Slovenia
males age 16-49: 483,488
females age 16-49: 470,325 (2010 est.)
Solomon Islands
males age 16-49: 150,987 (2010 est.)
Somalia
males age 16-49: 2,261,704
females age 16-49: 2,217,584 (2010 est.)
South Africa
males age 16-49: 13,508,255
females age 16-49: 12,541,371 (2010 est.)
Spain
males age 16-49: 9,851,306
females age 16-49: 9,574,929 (2010 est.)