Namibia
total: 18.3 years
male: 18 years
female: 18.6 years (2004 est.)
Nauru
total: 19.9 years
male: 19.5 years
female: 20.4 years (2004 est.)
Nepal
total: 19.9 years
male: 19.7 years
female: 20 years (2004 est.)
Netherlands
total: 38.7 years
male: 37.9 years
female: 39.6 years (2004 est.)
Netherlands Antilles
total: 32.1 years
male: 30.6 years
female: 33.6 years (2004 est.)
New Caledonia
total: 27.2 years
male: 26.9 years
female: 27.5 years (2004 est.)
New Zealand
total: 33.4 years
male: 32.6 years
female: 34.1 years (2004 est.)
Nicaragua
total: 20.2 years
male: 19.8 years
female: 20.6 years (2004 est.)
Niger
total: 16.2 years
male: 15.7 years
female: 16.7 years (2004 est.)
Nigeria
total: 18.1 years
male: 18.2 years
female: 17.9 years (2004 est.)