82% (2016)

59% (2013)

68% (2016)

70% (2011)

69% (2012)

57% (2013)

63% (2014)

62% (2013)

49% (2016)

59% (2015)

69% (2012)

62% (2007)

60% (2010)

62% (2013)

61% (2013)

65% (2012)

51% (2010)

48% (2009)

69% (2014)

60% (2010)