68% (1967)

61% (1968)

50% (1962)

0% (1976)

50% (1963)

57% (1981)

73% (1964)

50% (1984)

40% (1980)

52% (1971)

65% (1966)

57% (1953)

50% (1979)

50% (1985)

70% (1964)

50% (1988)

62% (1954)

50% (1962)

59% (1967)

63% (1991)