80% (1963)

75% (1960)

73% (1968)

82% (1960)

81% (1959)

66% (1976)

77% (1971)

77% (1967)

69% (1963)

61% (1973)

77% (1961)

68% (1968)

64% (1979)

54% (1972)

73% (1961)

75% (1963)

62% (1966)

50% (1968)

52% (1969)

61% (1964)