85% (1966)

81% (1965)

78% (1976)

64% (1976)

62% (1972)

70% (1972)

63% (1968)

66% (1972)

70% (1971)

68% (1969)

70% (1976)

70% (1972)

63% (1969)

69% (1968)

66% (1972)

63% (1968)

69% (1986)

60% (1971)

66% (1974)

68% (1969)