55% (2008)

68% (2011)

66% (2008)

67% (2008)

65% (2010)

73% (2012)

61% (2011)

60% (2011)

69% (2009)

68% (2008)

74% (2009)

64% (2010)

56% (2009)

63% (2012)

56% (2011)

56% (2007)

47% (2013)

75% (2014)

66% (2008)

62% (2011)