70% (1993)

69% (1992)

70% (1993)

52% (1991)

65% (1991)

66% (1992)

58% (1992)

72% (1992)

69% (1991)

52% (1992)

68% (1992)

67% (1993)

61% (1992)

55% (1992)

59% (1993)

53% (1993)

54% (1992)

62% (1991)

54% (1992)