85% (1966)

81% (1965)

69% (1986)

70% (1972)

64% (1976)

69% (1971)

79% (1976)

65% (1974)

66% (1976)

63% (1969)

68% (1969)

66% (1972)

70% (1972)

62% (1972)

60% (1971)

70% (1968)

55% (1968)

63% (1970)

70% (1976)

63% (1968)