67% (2003)

56% (2004)

62% (2005)

72% (2005)

68% (2004)

70% (2007)

71% (2007)

64% (2008)

66% (2005)

62% (2006)

43% (2008)

65% (2006)

61% (2007)

51% (2005)

62% (2007)

50% (2004)

44% (2005)

47% (2007)

51% (2005)

61% (2004)