72% (2004)

61% (2007)

82% (2006)

75% (2006)

74% (2002)

71% (2000)

67% (2002)

62% (2005)

48% (1997)

68% (2001)

52% (2008)

63% (1998)

50% (2007)

58% (2004)

68% (2005)

52% (1999)

72% (1998)

57% (1998)

62% (2001)

65% (1997)