49% (1983)

55% (1986)

51% (1986)

56% (1990)

42% (1983)

46% (1986)

0% (1991)

70% (1989)

75% (1984)

0% (1990)

82% (1984)

25% (1990)

50% (1988)

59% (1987)

10% (1990)

0% (1989)

70% (1983)

68% (1983)

60% (1986)

40% (1982)