45% (1989)

0% (1990)

63% (1987)

58% (1987)

46% (1986)

44% (1987)

33% (1988)

56% (1988)

38% (1987)

38% (1991)

60% (1988)

45% (1988)

60% (1989)

60% (1990)

68% (1988)

69% (1990)

55% (1987)

61% (1988)

68% (1988)

62% (1988)