83% (2009)

82% (2012)

78% (2015)

67% (2008)

70% (2007)

72% (2016)

72% (2012)

75% (2008)

78% (2010)

81% (2016)

63% (2005)

64% (2008)

67% (2008)

53% (2008)

66% (2014)

75% (2006)

81% (2007)

64% (2007)

65% (2007)

74% (2010)