0% (1979)

10% (1982)

70% (1977)

57% (1983)

0% (1984)

60% (1976)

59% (1975)

71% (1979)

72% (1978)

37% (1976)

58% (1985)

68% (1975)

10% (1980)

0% (1986)

0% (1982)

55% (1981)

0% (1993)

60% (1982)

0% (1984)

0% (1975)