63% (1962)

73% (1987)

74% (1970)

62% (1964)

59% (1965)

61% (1964)

75% (1963)

77% (1967)

57% (1969)

50% (1988)

55% (1985)

64% (1966)

57% (1965)

46% (1989)

58% (1965)

55% (1966)

67% (1987)

62% (1966)

59% (1962)

40% (1984)