71% (1985)

63% (2001)

47% (1988)

51% (1986)

49% (1985)

58% (1984)

66% (1986)

56% (1989)

58% (1986)

55% (1987)

57% (1987)

63% (1989)

65% (1986)

52% (1986)

50% (1986)

45% (1987)

48% (1988)

54% (1986)

52% (1989)

53% (1985)