80% (1999)

77% (2000)

83% (2005)

76% (2013)

75% (1976)

84% (1987)

84% (2005)

81% (1993)

59% (1998)

86% (2004)

76% (2009)

82% (2005)

80% (2010)

83% (1997)

78% (2014)

78% (2016)

55% (2006)

75% (1997)

74% (2004)

82% (2006)