0% (1984)

60% (1976)

72% (1978)

37% (1976)

70% (1977)

58% (1985)

0% (1986)

59% (1975)

71% (1979)

0% (1979)

63% (1979)

0% (1981)

10% (1980)

0% (1984)

60% (1982)

55% (1981)

0% (1982)

85% (1984)

0% (1991)

68% (1975)