69% (1989)

76% (1986)

61% (1986)

64% (1988)

69% (1987)

58% (1986)

58% (1986)

51% (1986)

63% (1987)

41% (1989)

55% (1987)

56% (1988)

67% (1987)

50% (1986)

58% (1987)

60% (1987)

59% (1987)

61% (1986)

39% (1988)

68% (1988)