65% (1984)

72% (1980)

44% (1988)

75% (1989)

58% (1982)

42% (1982)

57% (1983)

42% (1985)

45% (1986)

72% (1982)

55% (1984)

52% (1987)

0% (1992)

30% (1987)

0% (1986)

50% (1988)

50% (1981)

0% (1981)

53% (1975)