The 2009 CIA World Factbook

by United States. Central Intelligence Agency

Nicaragua
3.2% (2008 est.)
3.2% (2007 est.)
3.9% (2006 est.)

Niger
9.5% (2008 est.)
3.3% (2007 est.)
5.8% (2006 est.)

Nigeria
5.3% (2008 est.)
6.4% (2007 est.)
6.2% (2006 est.)

Niue
6.2% (2003 est.)

Northern Mariana Islands
NA%

Norway
2.5% (2008 est.)
6.2% (2007 est.)
4.4% (2006 est.)

Oman
6.4% (2008 est.)
5.8% (2007 est.)
7.5% (2006 est.)

Pakistan
3.4% (2008 est.)
6% (2007 est.)
6% (2006 est.)

Palau
5.5% (2005 est.)

Panama
9.2% (2008 est.)
11.5% (2007 est.)
8.5% (2006 est.)