71% (1985)

58% (1986)

48% (1985)

65% (1986)

50% (1986)

56% (1990)

64% (1986)

63% (2001)

53% (1986)

49% (1984)

59% (1984)

63% (1989)

48% (1988)

57% (1987)

40% (1988)

45% (1987)

52% (1987)

51% (1989)

52% (1989)

47% (1988)