55% (2009)

63% (2012)

56% (2012)

59% (2011)

53% (2012)

61% (2015)

57% (2006)

56% (2005)

48% (2011)

51% (2013)

62% (2007)

57% (2012)

55% (2012)

53% (2013)

51% (2006)

45% (2011)

41% (2011)

49% (2010)

50% (2013)

57% (2011)