80% (1957)

65% (1991)

10% (1990)

0% (1986)

70% (1960)

90% (1979)

39% (1987)

57% (1968)

50% (1959)

62% (1978)

72% (1969)

58% (1965)

38% (1959)

0% (1991)

0% (1976)

52% (1990)

0% (1980)

0% (1958)

50% (1975)

50% (1959)