85% (1966)

81% (1965)

64% (1976)

70% (1972)

79% (1976)

67% (1969)

70% (1976)

69% (1971)

69% (1968)

63% (1968)

62% (1969)

62% (1972)

60% (1971)

68% (1969)

63% (1968)

65% (1974)

69% (1986)

70% (1972)

70% (1970)

66% (1972)