47% (1986)

52% (1986)

50% (1988)

48% (1988)

55% (1987)

50% (1986)

46% (1987)

58% (1987)

59% (1987)

51% (1989)

32% (1986)

42% (1989)

48% (1988)

36% (1985)

50% (1987)

51% (1989)

35% (1987)

45% (1983)

40% (1988)

53% (1986)