The 2009 CIA World Factbook

by United States. Central Intelligence Agency

Bulgaria
6% (2008 est.)
6.2% (2007 est.)
6.3% (2006 est.)

Burkina Faso
5% (2008 est.)
3.7% (2007 est.)
5.5% (2006 est.)

Burma
1.1% (2008 est.)
3.4% (2007 est.)
3.4% (2006 est.)

Burundi
4.5% (2008 est.)
3.6% (2007 est.)
5.1% (2006 est.)

Cambodia
5% (2008 est.)
10.2% (2007 est.)
10.8% (2006 est.)

Cameroon
3.3% (2008 est.)
3.5% (2007 est.)
3.2% (2006 est.)

Canada
0.4% (2008 est.)
2.5% (2007 est.)
2.9% (2006 est.)

Cape Verde
5.5% (2008 est.)
6.9% (2007 est.)
10.8% (2006 est.)

Cayman Islands
0.9% (2004 est.)

Central African Republic
2.2% (2008 est.)
3.7% (2007 est.)
3.8% (2006 est.)