Iraq
total: 20.4 years
male: 20.3 years
female: 20.5 years (2009 est.)
Ireland
total: 35 years
male: 34.2 years
female: 35.7 years (2009 est.)
Isle of Man
total: 40.2 years
male: 39 years
female: 41.4 years (2009 est.)
Israel
total: 29.1 years
male: 28.4 years
female: 29.8 years (2009 est.)
Italy
total: 43.3 years
male: 41.8 years
female: 44.8 years (2009 est.)
Jamaica
total: 23.7 years
male: 23.1 years
female: 24.2 years (2009 est.)
Japan
total: 44.2 years
male: 42.4 years
female: 46.1 years (2009 est.)
Jersey
total: 42.9 years
male: 42.1 years
female: 43.6 years (2009 est.)
Jordan
total: 24.3 years
male: 25 years
female: 23.6 years (2009 est.)
Kazakhstan
total: 29.6 years
male: 28.1 years
female: 31.3 years (2009 est.)