Nepal
males age 16-49: 5,053,600
females age 16-49: 5,730,116 (2010 est.)
Netherlands
males age 16-49: 3,213,954
females age 16-49: 3,133,972 (2010 est.)
New Caledonia
males age 16-49: 49,173
females age 16-49: 49,619 (2010 est.)
New Zealand
males age 16-49: 840,977
females age 16-49: 828,081 (2010 est.)
Nicaragua
males age 16-49: 1,318,762
females age 16-49: 1,374,652 (2010 est.)
Niger
males age 16-49: 2,104,378
females age 16-49: 2,129,985 (2010 est.)
Nigeria
males age 16-49: 20,298,351
females age 16-49: 19,355,456 (2010 est.)
Northern Mariana Islands
males age 16-49: 9,359
females age 16-49: 12,385 (2010 est.)
Norway
males age 16-49: 888,310
females age 16-49: 864,344 (2010 est.)
Oman
males age 16-49: 816,579
females age 16-49: 622,927 (2010 est.)