58% (1986)

68% (1987)

32% (1987)

52% (1985)

56% (1987)

59% (1986)

53% (1987)

63% (1984)

65% (1985)

61% (1985)

60% (1986)

56% (1985)

57% (1984)

36% (1987)

63% (1986)

57% (1987)

61% (1984)

63% (1985)

55% (1986)

58% (1985)