72% (1982)

75% (1989)

57% (1983)

70% (1980)

50% (1981)

55% (1984)

45% (1986)

30% (1987)

42% (1982)

43% (1985)

58% (1982)

44% (1988)

69% (1984)

52% (1987)

50% (1988)

0% (1986)

0% (1992)

0% (1981)

53% (1975)