85% (1966)

81% (1965)

64% (1976)

70% (1972)

69% (1971)

79% (1976)

70% (1968)

62% (1972)

65% (1974)

70% (1976)

68% (1969)

70% (1972)

73% (1967)

63% (1968)

63% (1968)

63% (1969)

60% (1971)

70% (1986)

66% (1972)

66% (1976)