69% (1979)

76% (1984)

78% (1995)

77% (1988)

64% (2020)

53% (1976)

74% (1981)

67% (1969)

61% (1964)

77% (1980)

61% (1971)

76% (1982)

73% (1985)

0% (1982)

79% (1996)

72% (1992)

70% (1967)

64% (1964)

74% (1998)

67% (2003)