Niue
NA

Norfolk Island
NA

Northern Mariana Islands
NA

Norway
6.7% of GDP (2007)

Oman
4% of GDP (2006)

Pakistan
2.9% of GDP (2008)

Palau
10.3% of GDP (2002)

Panama
3.8% of GDP (2008)

Papua New Guinea
NA

Paraguay
4% of GDP (2008)