52% (1979)

35% (1981)

68% (1976)

55% (1986)

61% (1982)

60% (1979)

75% (1978)

50% (1985)

55% (1978)

0% (1986)

0% (1980)

71% (1979)

72% (1981)

20% (1983)

20% (1982)

58% (1978)

25% (1985)

20% (1982)

20% (1982)

0% (1980)