75% (2011)

80% (2012)

62% (2014)

49% (2008)

60% (2013)

68% (2013)

43% (2016)

67% (2010)

47% (2014)

56% (2010)

56% (2007)

49% (2012)

53% (2006)

62% (2012)

57% (2008)

44% (2012)

59% (2007)

71% (2016)

53% (2009)

56% (2011)