52% (1997)

78% (2017)

75% (1996)

82% (2013)

69% (2016)

65% (2002)

68% (2012)

68% (2005)

68% (2001)

50% (2007)

72% (1984)

73% (2007)

70% (2016)

76% (2017)

59% (2014)

45% (2004)

68% (2016)

70% (1996)

78% (1999)

74% (2010)