Russia
males age 18-49: 21,049,651
females age 18-49: 29,056,021 (2005 est.)
Rwanda
males age 16-49: 1,103,823
females age 16-49: 1,096,644 (2005 est.)
Saint Kitts and Nevis
males age 18-49: 7,119
females age 18-49: 7,645 (2005 est.)
Saint Lucia
males age 18-49: 33,539 (2005 est.)
Saint Vincent and the Grenadines
males age 18-49: 25,787 (2005 est.)
Samoa
males age 18-49: 45,294 (2005 est.)
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.)