n: 1.04 male(s)/female (2005 est.)

Samoa
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1.66 male(s)/female
65 years and over: 0.84 male(s)/female
total population: 1.39 male(s)/female (2005 est.)

San Marino
at birth: 1.09 male(s)/female
under 15 years: 1.07 male(s)/female
15-64 years: 0.93 male(s)/female
65 years and over: 0.76 male(s)/female
total population: 0.92 male(s)/female (2005 est.)

Sao Tome and Principe
at birth: 1.03 male(s)/female
under 15 years: 1.03 male(s)/female
15-64 years: 0.94 male(s)/female
65 years and over: 0.85 male(s)/female
total population: 0.97 male(s)/female (2005 est.)

Saudi Arabia
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1.34 male(s)/female
65 years and over: 1.16 male(s)/female
total population: 1.21 male(s)/female (2005 est.)

Senegal
at birth: 1.03 male(s)/female
under 15 years: 1.02 male(s)/female
15-64 years: 0.93 male(s)/female
65 years and over: 0.91 male(s)/female
total population: 0.97 male(s)/female (2005 est.)

Serbia and Montenegro
at birth: 1.08 male(s)/female
under 15 years: 1.08 male(s)/female
15-64 years: 0.99 male(s)/female
65 years and over: 0.75 male(s)/female
total population: 0.97 male(s)/female (2005 est.)

Seychelles
at birth: 1.03 male(s)/female
under 15 years: 1.02 male(s)/female
15-64 years: 0.95 male(s)/female
65 years and over: 0.48 male(s)/female
total population: 0.93 male(s)/female (2005 est.)

Sierra Leone
at birth: 1.03 male(s)/female
under 15 years: 0.96 male(s)/female
15-64 years: 0.91 male(s)/female
65 years and over: 0.9 male(s)/female
total population: 0.93 male(s)/female (2005 est.)

Singapore
at birth: 1.08 male(s)/female
under 15 years: 1.07 male(s)/female
15-64 years: 0.95 male(s)/female
65 years and over: 0.79 male(s)/female
total population: 0.96 male(s)/female (2005 est.)

Slovakia
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 0.99 male(s)/female
65 years and over: 0.6 male(s)/female
total population: 0.94 male(s)/female (2005 est.)

Slovenia
at birth: 1.07 male(s)/female
under 15 years: 1.06 male(s)/female
15-64 years: 1.02 male(s)/female
65 years and over: 0.62 male(s)/female
total population: 0.95 male(s)/female (2005 est.)

Solomon Islands
at birth: 1.05 male(s)/female
under 15 yea