The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Niger
$4.174 billion (2007 est.)

Nigeria
$166.8 billion (2007 est.)

Niue
$10.01 million (2003)

Northern Mariana Islands
$633.4 million (2000)

Norway
$391.5 billion (2007 est.)

Oman
$40.06 billion (2007 est.)

Pakistan
$143.8 billion (2007 est.)

Palau
$145 million (2005)

Panama
$19.74 billion (2007 est.)

Papua New Guinea
$6.001 billion (2007 est.)