Bulgaria
31.9 (2001)

Burkina Faso
48.2 (1998)

Burundi
33.3 (1998)

Cambodia
40 (2004 est.)

Cameroon
44.6 (2001)

Canada
33.1 (1998)

Central African Republic
61.3 (1993)

Chile
57.1 (2000)

China
44 (2002)

Colombia
53.8 (2005)