56% (1969)

61% (1974)

52% (1969)

64% (1977)

58% (1972)

58% (1976)

58% (1976)

62% (1970)

42% (1971)

50% (1970)

50% (1973)

50% (1967)

50% (1977)

58% (1967)

73% (1967)

52% (1969)

36% (1974)

50% (1968)

70% (1991)

54% (1967)