Iran
total: 24.8 years
male: 24.6 years
female: 25 years (2006 est.)
Iraq
total: 19.7 years
male: 19.6 years
female: 19.8 years (2006 est.)
Ireland
total: 34 years
male: 33.2 years
female: 34.8 years (2006 est.)
Isle of Man
total: 39.6 years
male: 38.4 years
female: 41 years (2006 est.)
Israel
total: 29.6 years
male: 28.8 years
female: 30.5 years (2006 est.)
Italy
total: 42.2 years
male: 40.7 years
female: 43.7 years (2006 est.)
Jamaica
total: 23 years
male: 22.4 years
female: 23.5 years (2006 est.)
Japan
total: 42.9 years
male: 41.1 years
female: 44.7 years (2006 est.)
Jersey
total: 41.4 years
male: 40.7 years
female: 42.1 years (2006 est.)
Jordan
total: 23 years
male: 23.7 years
female: 22.4 years (2006 est.)