75% (2011)

67% (2010)

62% (2012)

62% (2014)

49% (2008)

56% (2007)

43% (2016)

71% (2016)

47% (2014)

56% (2010)

53% (2006)

53% (2006)

60% (2013)

49% (2008)

59% (2007)

57% (2008)

51% (2010)

53% (2009)

68% (2013)

53% (2010)