81% (1988)

86% (2001)

84% (2004)

75% (2023)

83% (1997)

78% (1989)

78% (2008)

80% (1986)

78% (1992)

77% (2010)

79% (1995)

71% (2002)

78% (2013)

66% (2006)

76% (2011)

80% (2014)

74% (2004)

72% (1994)

81% (2013)

74% (1991)