57% (1989)

43% (1986)

56% (1988)

66% (1989)

63% (1987)

0% (1989)

73% (1990)

65% (1988)

55% (1988)

33% (1987)

0% (1991)

46% (1986)

38% (1987)

70% (1987)

40% (1990)

38% (1992)

54% (1991)

33% (1988)

38% (1988)

48% (1987)