84% (2002)

69% (1999)

67% (1997)

70% (1996)

74% (2000)

71% (1999)

51% (2002)

51% (2001)

62% (1999)

65% (2004)

72% (1999)

48% (2005)

72% (1995)

66% (2005)

68% (2004)

49% (2003)

61% (2001)

61% (1999)

54% (2006)

60% (2001)