est.)

Sierra Leone
at birth: 1.03 male(s)/female
under 15 years: 0.96 male(s)/female
15-64 years: 0.92 male(s)/female
65 years and over: 0.89 male(s)/female
total population: 0.94 male(s)/female (2006 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: 0.8 male(s)/female
total population: 0.96 male(s)/female (2006 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 (2006 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: 0.63 male(s)/female
total population: 0.95 male(s)/female (2006 est.)

Solomon Islands
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1.02 male(s)/female
65 years and over: 0.92 male(s)/female
total population: 1.03 male(s)/female (2006 est.)

Somalia
at birth: 1.03 male(s)/female
under 15 years: 1.01 male(s)/female
15-64 years: 1.01 male(s)/female
65 years and over: 0.73 male(s)/female
total population: 1 male(s)/female (2006 est.)

South Africa
at birth: 1.02 male(s)/female
under 15 years: 1.01 male(s)/female
15-64 years: 0.95 male(s)/female
65 years and over: 0.63 male(s)/female
total population: 0.95 male(s)/female (2006 est.)

Spain
at birth: 1.07 male(s)/female
under 15 years: 1.06 male(s)/female
15-64 years: 1.01 male(s)/female
65 years and over: 0.72 male(s)/female
total population: 0.96 male(s)/female (2006 est.)

Sri Lanka
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 0.94 male(s)/female
65 years and over: 0.86 male(s)/female
total population: 0.96 male(s)/female (2006 est.)

Sudan
at birth: 1.05 male(s)/female
under 15 years: 1.04 male(s)/female
15-64 years: 1 male(s)/female
65 years and over: 1.15 male(s)/female
total population: 1.02 male(s)/female (2006 est.)

Suriname
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 1.06 male(s)/female
65 years and over: 0.79 male(s)/female
total population: 1.04 male(s)/female (2006 est.)

Svalbard
NA

Swaziland
at birth: 1.03 male(s)/female
under 15 years: 1.02 male(s)/female
15-64 years: 0.92 ma