72% (2018)

82% (2010)

90% (1998)

59% (2013)

84% (1985)

74% (2001)

79% (1969)

61% (2016)

75% (1985)

82% (1984)

82% (1993)

69% (1994)

67% (1985)

77% (2009)

76% (2011)

78% (2009)

72% (2004)

62% (1958)

71% (2005)

70% (1957)