63% (1970)

69% (1971)

64% (1971)

56% (1971)

33% (1972)

61% (1968)

62% (1971)

54% (1967)

75% (1969)

53% (1963)

53% (1973)

53% (1967)

59% (1970)

58% (1962)

59% (1973)

60% (1969)

80% (1964)

40% (1968)

64% (1961)

58% (1968)