76% (2000)

69% (1998)

55% (2000)

61% (1999)

68% (2000)

63% (1997)

61% (1999)

62% (2000)

71% (1999)

65% (1999)

57% (2000)

60% (2000)

64% (1997)

57% (1997)

59% (1997)

54% (2001)

60% (1999)

48% (2000)

59% (1998)

70% (2000)