85% (1966)

70% (1972)

80% (1965)

64% (1976)

65% (1974)

63% (1972)

78% (1976)

69% (1971)

67% (1969)

73% (1967)

70% (1972)

70% (1976)

63% (1968)

69% (1968)

65% (1976)

61% (1971)

62% (1969)

63% (1970)

70% (1986)

66% (1972)