82% (2019)

69% (2012)

74% (1998)

81% (2013)

63% (2005)

72% (2015)

78% (2015)

71% (2005)

49% (1977)

50% (1996)

79% (1999)

77% (1991)

54% (2002)

84% (1990)

72% (2003)

80% (2004)

60% (1957)

76% (1982)

53% (1992)

81% (2010)