50% (1982)

63% (1985)

33% (1977)

57% (1978)

70% (1971)

48% (1980)

10% (1991)

67% (1967)

53% (1991)

38% (1980)

40% (1984)

0% (1966)

73% (1983)

27% (1979)

46% (1970)

0% (1987)

60% (1978)

60% (1976)

52% (1960)

61% (1981)