76% (2000)

59% (1998)

70% (1998)

61% (1999)

65% (1999)

61% (2000)

61% (1999)

63% (1997)

60% (1998)

71% (1999)

68% (2000)

62% (2000)

57% (2000)

55% (2000)

59% (1997)

57% (1997)

62% (2000)

58% (1998)

65% (1997)

65% (1998)