Russia
males age 18-49: 35,247,049
females age 18-49: 35,986,426 (2005 est.)
Rwanda
males age 16-49: 2,004,750
females age 16-49: 1,990,935 (2005 est.)
Saint Kitts and Nevis
males age 18-49: 9,196
females age 18-49: 9,236 (2005 est.)
Saint Lucia
males age 18-49: 42,742 (2005 est.)
Saint Vincent and the Grenadines
males age 18-49: 31,489 (2005 est.)
Samoa
males age 18-49: 58,722 (2005 est.)
San Marino
males age 18-49: 6,331 (2005 est.)
Sao Tome and Principe
males age 18-49: 33,438
females age 18-49: 35,279 (2005 est.)
Saudi Arabia
males age 18-49: 7,648,999
females age 18-49: 5,417,922 (2005 est.)
Senegal
males age 18-49: 2,443,840
females age 18-49: 2,461,939 (2005 est.)