75% (2011)

66% (2010)

63% (2012)

73% (2010)

70% (2010)

61% (2012)

58% (2009)

57% (2012)

63% (2009)

67% (2009)

63% (2010)

71% (2013)

57% (2011)

61% (2011)

60% (2008)

60% (2010)

67% (2011)

65% (2011)

66% (2009)

55% (2009)