64% (2015)

70% (2011)

66% (2014)

71% (2015)

72% (2013)

58% (2007)

30% (2008)

74% (2006)

0% (2003)

53% (2014)

66% (2016)

72% (2011)

80% (2015)

0% (2013)

75% (2011)

70% (2012)

79% (2014)

60% (2011)

55% (2009)

60% (2006)