74% (2011)

62% (2014)

49% (2008)

71% (2016)

62% (2012)

52% (2014)

67% (2010)

47% (2014)

56% (2010)

64% (2011)

57% (2008)

55% (2007)

59% (2007)

49% (2012)

53% (2009)

53% (2006)

53% (2006)

56% (2007)

43% (2016)

48% (2006)