The 2008 CIA World Factbook

by United States. Central Intelligence Agency

Uganda
6% (2007 est.)

Ukraine
7.7% (2007 est.)

United Arab Emirates
7.5% (2007 est.)

United Kingdom
3.1% (2007 est.)

United States
2% (2007 est.)

Uruguay
7.4% (2007 est.)

Uzbekistan
9.5% (2007 est.)

Vanuatu
5% (2007 est.)

Venezuela
8.4% (2007 est.)

Vietnam
8.5% (2007 est.)