79% (1964)

70% (2005)

76% (1987)

82% (2011)

81% (2001)

72% (2001)

84% (2018)

77% (2007)

84% (1997)

61% (2003)

78% (2006)

44% (2004)

79% (2006)

72% (1982)

67% (2012)

75% (2016)

77% (1987)

85% (1994)

86% (2011)

82% (1998)