80% (1976)

82% (1979)

73% (1966)

69% (1985)

64% (1982)

78% (1956)

72% (1981)

71% (1967)

63% (1972)

74% (1968)

72% (1984)

57% (1984)

62% (1988)

70% (1968)

73% (1965)

52% (1987)

67% (1986)

62% (1965)

48% (1971)

72% (1971)