76% (2000)

61% (1999)

68% (2000)

65% (1999)

71% (1999)

61% (2000)

58% (1998)

61% (1999)

63% (1997)

63% (2000)

57% (2000)

55% (2000)

71% (1999)

64% (1998)

59% (1997)

65% (1997)

57% (1997)

59% (1998)

48% (2000)

60% (1995)