52% (2015)

48% (2014)

58% (2012)

67% (2009)

56% (2010)

56% (2011)

46% (2010)

54% (2011)

55% (2011)

45% (2016)

47% (2014)

53% (2013)

52% (2014)

80% (2008)

58% (2012)

50% (2009)

42% (2009)

69% (2012)

57% (2013)

41% (2011)