Nauru
males age 16-49: 3,682 (2010 est.)
Nepal
males age 16-49: 6,699,614
females age 16-49: 7,388,240 (2010 est.)
Netherlands
males age 16-49: 3,927,311
females age 16-49: 3,831,110 (2010 est.)
New Caledonia
males age 16-49: 59,612 (2010 est.)
New Zealand
males age 16-49: 1,017,575
females age 16-49: 1,003,087 (2010 est.)
Nicaragua
males age 16-49: 1,605,398
females age 16-49: 1,594,270 (2010 est.)
Niger
males age 16-49: 3,202,237
females age 16-49: 3,151,521 (2010 est.)
Nigeria
males age 16-49: 36,203,921
females age 16-49: 34,409,821 (2010 est.)
Norway
males age 16-49: 1,078,562
females age 16-49: 1,049,529 (2010 est.)
Oman
males age 16-49: 964,200
females age 16-49: 714,421 (2010 est.)