83% (2009)

85% (2000)

81% (2002)

79% (2013)

75% (2007)

79% (2011)

71% (2010)

78% (2007)

72% (2013)

68% (2000)

71% (2002)

71% (2014)

66% (2010)

70% (2007)

68% (2005)

66% (1998)

70% (2005)

67% (2009)

72% (2010)

65% (2000)