72% (1972)

76% (1964)

75% (1965)

68% (1963)

75% (1966)

58% (1964)

76% (1963)

71% (1964)

64% (1964)

65% (1965)

63% (1963)

59% (1967)

69% (1970)

62% (1966)

56% (1964)

63% (1963)

74% (1970)

61% (1964)

56% (1969)

63% (1970)