71% (1985)

63% (2001)

56% (1989)

51% (1986)

48% (1984)

52% (1985)

63% (1989)

50% (1985)

59% (1984)

65% (1986)

47% (1988)

65% (1986)

55% (1987)

38% (1985)

50% (1986)

57% (1986)

45% (1987)

53% (1986)

57% (1987)

48% (1988)