38% (1987)

54% (1988)

41% (1986)

40% (1990)

17% (1988)

62% (1990)

72% (1988)

33% (1987)

52% (1986)

54% (1991)

0% (1988)

60% (1988)

48% (1987)

45% (1989)

63% (1988)

40% (1992)

58% (1989)

38% (1988)

46% (1986)

33% (1988)