80% (1993)

85% (1992)

79% (1995)

62% (1990)

83% (1994)

82% (1992)

70% (1991)

78% (1990)

64% (1996)

71% (1993)

69% (1990)

74% (1994)

73% (1994)

69% (1992)

10% (2001)

72% (1998)

56% (1992)

68% (1994)

58% (1998)

54% (1993)