85% (1966)

80% (1965)

62% (1969)

69% (1972)

64% (1976)

68% (1969)

69% (1971)

66% (1976)

68% (1976)

62% (1972)

65% (1974)

70% (1976)

63% (1968)

70% (1967)

78% (1976)

69% (1968)

68% (1969)

69% (1986)

66% (1972)

69% (1972)