Namibia
total: 21.4 years
male: 21.3 years
female: 21.4 years (2010 est.)
Nauru
total: 23.8 years
male: 24 years
female: 23.6 years (2010 est.)
Nepal
total: 21.2 years
male: 20.2 years
female: 22.1 years (2010 est.)
Netherlands
total: 40.8 years
male: 40 years
female: 41.6 years (2010 est.)
New Caledonia
total: 29.8 years
male: 29.3 years
female: 30.3 years (2010 est.)
New Zealand
total: 36.8 years
male: 36 years
female: 37.6 years (2010 est.)
Nicaragua
total: 22.5 years
male: 22.1 years
female: 22.9 years (2010 est.)
Niger
total: 15.2 years
male: 15 years
female: 15.4 years (2010 est.)
Nigeria
total: 19.1 years
male: 19 years
female: 19.2 years (2010 est.)
Northern Mariana Islands
total: 29.3 years
male: 29.9 years
female: 29.1 years (2010 est.)