The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Niger
4.25% (31 December 2007)

Nigeria
9.5% (31 December 2007)

Norway
6.25% (31 December 2007)

Oman
1.98% (31 December 2007)

Pakistan
10% (31 December 2007)

Papua New Guinea
7.38% (31 December 2007)

Paraguay
20% (31 December 2007)

Peru
5.75% (31 December 2007)

Philippines
4.28% (31 December 2007)

Poland
5% (31 December 2007)