The 2005 CIA World Factbook

by United States. Central Intelligence Agency

Saint Vincent and the Grenadines
total: 26.36 years
male: 26.21 years
female: 26.53 years (2005 est.)

Samoa
total: 24.59 years
male: 27.42 years
female: 21.42 years (2005 est.)

San Marino
total: 40.29 years
male: 39.91 years
female: 40.65 years (2005 est.)

Sao Tome and Principe
total: 16.12 years
male: 15.53 years
female: 16.71 years (2005 est.)

Saudi Arabia
total: 21.28 years
male: 22.84 years
female: 19.28 years (2005 est.)

Senegal
total: 18.15 years
male: 17.6 years
female: 18.7 years (2005 est.)

Serbia and Montenegro
total: 36.79 years
male: 35.3 years
female: 38.29 years (2005 est.)

Seychelles
total: 27.7 years
male: 26.62 years
female: 28.76 years (2005 est.)

Sierra Leone
total: 17.53 years
male: 17.2 years
female: 17.84 years (2005 est.)

Singapore
total: 36.76 years
male: 36.4 years
female: 37.07 years (2005 est.)