79% (2013)

67% (2015)

69% (2015)

70% (2011)

79% (2016)

70% (1997)

77% (2007)

73% (2014)

57% (2004)

64% (2004)

59% (2016)

69% (2007)

63% (2012)

67% (2009)

71% (2010)

70% (2005)

86% (2005)

20% (2003)

40% (2002)

0% (2009)