79% (2002)

83% (2011)

79% (2006)

75% (2007)

77% (1987)

76% (2001)

83% (2009)

82% (2015)

67% (1993)

75% (1984)

68% (2009)

77% (2016)

79% (2021)

67% (2010)

67% (1992)

72% (2004)

74% (1997)

72% (2002)

73% (1985)

75% (2017)