63% (1983)

66% (1982)

56% (1986)

66% (1985)

0% (1981)

78% (1983)

56% (1985)

56% (1982)

70% (1985)

64% (1984)

50% (1985)

47% (1980)

72% (1987)

69% (1981)

72% (1982)

43% (1985)

65% (1984)

50% (1982)

0% (1981)

0% (1982)