57% (1966)

72% (1965)

72% (1963)

68% (1960)

63% (1963)

66% (1960)

57% (1967)

70% (1966)

67% (1966)

59% (1965)

35% (1952)

60% (1970)

55% (1964)

71% (1958)

55% (1967)

62% (1961)

60% (1960)

54% (1964)

76% (1966)

52% (1968)