74% (1965)

65% (1965)

69% (1977)

70% (1968)

68% (1970)

67% (1971)

60% (1960)

56% (1965)

63% (1960)

50% (1959)

54% (1967)

63% (1970)

57% (1965)

50% (1960)

47% (1960)

50% (1961)

36% (1963)

58% (1962)

40% (1960)

40% (1959)