73% (1970)

52% (1951)

56% (1968)

64% (1971)

53% (1971)

64% (1970)

60% (1977)

57% (1965)

49% (1964)

54% (1969)

59% (1979)

62% (1969)

62% (1964)

55% (1970)

54% (1964)

53% (1970)

53% (1969)

45% (1971)

76% (1969)

61% (1954)