67% (2015)

70% (1997)

79% (2013)

69% (2015)

79% (2016)

70% (2011)

77% (2007)

73% (2014)

58% (2004)

70% (2005)

69% (2007)

64% (2004)

66% (2009)

59% (2016)

62% (2012)

10% (2007)

71% (2010)

20% (2003)

86% (2005)

40% (2002)