67% (2013)

69% (2014)

55% (2009)

58% (2011)

70% (2012)

10% (2010)

43% (2008)

77% (1987)

60% (2006)

45% (2011)

58% (2007)

74% (2015)

80% (2007)

65% (2014)

67% (2005)

72% (2003)

70% (2012)

65% (2012)

0% (2006)

79% (2015)