51% (1985)

58% (1985)

30% (1987)

39% (1987)

62% (1977)

72% (1987)

52% (1985)

50% (1985)

29% (1985)

47% (1988)

55% (1985)

40% (1988)

65% (1987)

50% (1980)

63% (1987)

23% (1986)

42% (1987)

45% (1979)

50% (1986)

53% (1989)