86% (1989)

76% (1981)

82% (2005)

76% (2010)

80% (2016)

86% (1996)

77% (2005)

69% (2004)

74% (1996)

86% (2016)

79% (1995)

71% (2009)

77% (2013)

78% (2006)

73% (2002)

60% (2011)

73% (2006)

65% (2011)

77% (2001)

58% (2009)