85% (1966)

81% (1965)

70% (1972)

64% (1976)

69% (1968)

78% (1976)

69% (1971)

63% (1972)

67% (1969)

70% (1972)

66% (1974)

61% (1971)

68% (1969)

63% (1968)

70% (1986)

62% (1969)

73% (1967)

63% (1970)

64% (1968)

68% (1976)