72% (2023)

75% (2015)

71% (2018)

57% (2015)

66% (2011)

69% (2006)

61% (2016)

71% (1985)

76% (1969)

58% (1990)

56% (2011)

80% (1980)

69% (1982)

61% (1988)

59% (1977)

71% (1967)

68% (1974)

62% (2004)

67% (1972)

73% (1979)