77% (1966)

67% (1967)

82% (1962)

57% (1970)

74% (1963)

50% (1970)

72% (1970)

55% (1970)

74% (1962)

70% (1967)

67% (1964)

56% (1969)

60% (1968)

63% (1966)

56% (1968)

60% (1965)

41% (1972)

47% (1970)

62% (1964)

65% (1970)