67% (1997)

62% (1993)

70% (2001)

87% (1994)

0% (2006)

0% (2003)

86% (1993)

81% (1987)

60% (1989)

0% (2004)

71% (1988)

0% (2008)

0% (1970)

98% (1988)

88% (1991)

76% (1987)

0% (1970)

0% (1989)

73% (1993)

0% (1999)