74% (2015)

70% (2018)

61% (2016)

72% (2023)

66% (2011)

71% (1985)

69% (2006)

80% (1980)

58% (1990)

69% (1982)

73% (1979)

57% (2015)

56% (2011)

67% (1972)

61% (1988)

76% (1969)

71% (1967)

62% (2004)

61% (1981)

66% (1977)