Australia
35.2 (1994)

Austria
31 (2002)

Azerbaijan
36.5 (2001)

Bangladesh
31.8 (2000)

Belarus
30.4 (2000)

Belgium
25 (1996)

Bolivia
60.6 (2002)

Bosnia and Herzegovina
26.2 (2001)

Botswana
63 (1993)

Brazil
59.7 (2004)