006 est.)

Puerto Rico
total: 34.7 years
male: 33 years
female: 36.4 years (2006 est.)

Qatar
total: 31.7 years
male: 37.1 years
female: 22.7 years (2006 est.)

Romania
total: 36.6 years
male: 35.3 years
female: 37.9 years (2006 est.)

Russia
total: 38.4 years
male: 35.2 years
female: 41.3 years (2006 est.)

Rwanda
total: 18.6 years
male: 18.4 years
female: 18.8 years (2006 est.)

Saint Helena
total: 36 years
male: 36.2 years
female: 35.8 years (2006 est.)

Saint Kitts and Nevis
total: 27.8 years
male: 27.1 years
female: 28.6 years (2006 est.)

Saint Lucia
total: 25.2 years
male: 24.4 years
female: 26.1 years (2006 est.)

Saint Pierre and Miquelon
total: 34.1 years
male: 33.7 years
female: 34.5 years (2006 est.)

Saint Vincent and the Grenadines
total: 26.9 years
male: 26.7 years
female: 27.1 years (2006 est.)

Samoa
total: 25.2 years
male: 28.1 years
female: 22 years (2006 est.)

San Marino
total: 40.6 years
male: 40.3 years
female: 41 years (2006 est.)

Sao Tome and Principe
total: 16.2 years
male: 15.6 years
female: 16.8 years (2006 est.)

Saudi Arabia
total: 21.4 years
male: 22.9 years
female: 19.4 years (2006 est.)

Senegal
total: 19.1 years
male: 18.9 years
female: 19.3 years (2006 est.)

Serbia
total: 40.4 years
male: 39.1 years
female: 41.7 years

Seychelles
total: 28.1 years
male: 27 years
female: 29.1 years (2006 est.)

Sierra Leone
total: 17.4 years
male: 17.1 years
female: 17.7 years (2006 est.)

Singapore
total: 37.3 years
male: 36.9 years
female: 37.6 years (2006 est.)

Slovakia
total: 35.8 years
male: 34.2 years
female: 37.6 years (2006 est.)

Slovenia
total: 40.6 years
male: 39 years
female: 42.2 years (2006 est.)

Solomon Islands
total: 18.9 years
male: 18.7 years
female: 19 years (2006 est.)

Somalia
total: 17.6 years
male: 17.5 years
female: 17.7 years (2006 est.)

South Africa
total: 24.1 years
male: 23.3 years
female: 25 years (2006 est.)

Spain
total: 39.9 years
male: 38.6 years
female: 41.3 years (2006 est.)

Sri Lanka
total: 29.8 years
male: 28.7 years
female: 30.9 years (2006 est.)

Sudan
total: 18.3 years
male: 18.1 years
female: 18.5 years (2006 est.)

Suriname
total: 26.5 years
male: 26 years
female: 26.9 years (2006 est.)