53% (1987)

67% (1987)

61% (1984)

64% (1986)

58% (1984)

63% (1984)

58% (1986)

60% (1986)

64% (1986)

58% (1985)

56% (1985)

63% (1985)

58% (1986)

55% (1987)

64% (1987)

57% (1987)

57% (1985)

32% (1987)

52% (1985)

65% (1985)