66% (1963)

57% (1965)

62% (1968)

64% (1969)

54% (1970)

60% (1954)

60% (1964)

54% (1969)

52% (1971)

75% (1969)

53% (1971)

64% (1971)

56% (1968)

63% (1970)

65% (1958)

49% (1964)

80% (1968)

51% (1969)

59% (1979)

41% (1969)