71% (1993)

68% (1992)

70% (1993)

65% (1992)

67% (1993)

52% (1991)

55% (1992)

53% (1992)

69% (1991)

68% (1992)

58% (1992)

61% (1992)

65% (1991)

56% (1992)

72% (1992)

53% (1993)

62% (1991)

54% (1992)

59% (1993)