81% (2004)

61% (2009)

64% (2009)

66% (2011)

53% (2004)

60% (2010)

66% (2010)

62% (2005)

62% (2008)

73% (2003)

51% (2006)

59% (2008)

52% (2006)

68% (2007)

77% (2006)

52% (2007)

56% (2007)

47% (2011)

0% (2006)