68% (1971)

56% (1971)

64% (1971)

53% (1967)

62% (1970)

62% (1974)

58% (1968)

59% (1973)

53% (1963)

60% (1970)

61% (1968)

53% (1973)

62% (1971)

40% (1968)

61% (1968)

49% (1963)

25% (1963)

75% (1969)

54% (1967)

50% (1971)