58% (1971)

70% (1979)

77% (1988)

74% (1985)

64% (2020)

60% (1964)

76% (1980)

76% (1984)

74% (1981)

53% (1976)

68% (1969)

62% (1971)

76% (1984)

67% (2003)

64% (1964)

77% (1982)

73% (1998)

61% (1980)

64% (1973)

70% (1986)