74% (1970)

72% (1987)

63% (1964)

63% (1962)

59% (1965)

62% (1966)

68% (1965)

61% (1964)

74% (1966)

46% (1989)

75% (1963)

62% (1975)

77% (1967)

58% (1969)

70% (1967)

61% (1974)

57% (1965)

50% (1984)

74% (1968)

50% (1988)