74% (2011)

45% (2016)

62% (2012)

67% (2010)

49% (2008)

62% (2014)

71% (2016)

49% (2008)

71% (2006)

55% (2007)

49% (2012)

56% (2010)

60% (2013)

62% (2008)

53% (2006)

53% (2009)

57% (2007)

59% (2007)

68% (2013)

53% (2006)