61% (2012)

57% (2009)

55% (2007)

49% (2008)

62% (2010)

72% (2009)

69% (2011)

59% (2008)

67% (2013)

65% (2016)

51% (2010)

51% (2012)

67% (2009)

56% (2013)

64% (2009)

71% (2011)

58% (2008)

37% (2010)