73% (1987)

63% (1964)

61% (1964)

73% (1970)

63% (1962)

59% (1965)

76% (1963)

49% (1988)

68% (1967)

57% (1969)

64% (1964)

63% (1987)

64% (1966)

70% (1967)

77% (1970)

64% (1967)

78% (1967)

63% (1967)

55% (1965)

43% (1989)