69% (2001)

82% (2010)

86% (2011)

30% (2016)

68% (1981)

51% (2009)

80% (1996)

73% (2007)

86% (2018)

76% (2015)

79% (2014)

58% (1962)

47% (1997)

65% (1969)

78% (1979)

77% (2005)

71% (2012)

58% (2016)

69% (1984)

76% (1964)