100% (1994)

72% (1999)

73% (1994)

71% (1993)

86% (1992)

63% (1990)

64% (1996)

60% (1992)

78% (1990)

80% (1993)

83% (1994)

68% (1992)

79% (1995)

66% (1996)

71% (1998)

68% (1994)

69% (1990)

82% (1992)

80% (1990)

55% (1993)