81% (2004)

61% (2009)

53% (2004)

60% (2010)

67% (2011)

64% (2009)

74% (2003)

53% (2006)

62% (2004)

62% (2005)

51% (2006)

66% (2010)

69% (2007)

62% (2008)

59% (2008)

77% (2006)

56% (2007)

52% (2007)

0% (2006)

47% (2011)