84% (2002)

67% (1997)

70% (1999)

74% (2000)

51% (2001)

70% (1996)

66% (2005)

72% (1999)

61% (2001)

72% (1995)

71% (1999)

49% (2003)

65% (2004)

62% (1999)

54% (2006)

68% (2004)

57% (1997)

50% (2000)

61% (1999)

68% (2003)