Sierra Leone
total: 19 years
male: 18.6 years
female: 19.5 years (2010 est.)
Singapore
total: 39.6 years
male: 39.1 years
female: 40 years (2010 est.)
Slovakia
total: 37.3 years
male: 35.7 years
female: 38.9 years (2010 est.)
Slovenia
total: 42.1 years
male: 40.4 years
female: 43.7 years (2010 est.)
Solomon Islands
total: 20.6 years
male: 20.4 years
female: 20.8 years (2010 est.)
Somalia
total: 17.6 years
male: 17.4 years
female: 17.7 years (2010 est.)
South Africa
total: 24.7 years
male: 24.4 years
female: 25 years (2010 est.)
Spain
total: 40.1 years
male: 38.9 years
female: 41.5 years (2010 est.)
Sri Lanka
total: 31.3 years
male: 30.3 years
female: 32.2 years (2010 est.)
Sudan
total: 18.4 years
male: 18 years
female: 18.8 years (2010 est.)