62% (1973)

72% (1964)

51% (1974)

65% (1970)

66% (1971)

64% (1974)

77% (1973)

42% (1975)

52% (1969)

49% (1975)

76% (1965)

88% (1969)

56% (1971)

65% (1964)

58% (1977)

57% (1978)

67% (1970)

73% (1974)

85% (1978)

70% (1966)