74% (2010)

76% (2010)

71% (2015)

71% (2014)

66% (2012)

74% (2006)

72% (2011)

70% (2007)

71% (2011)

59% (2009)

74% (2012)

64% (2013)

67% (2010)

70% (2010)

63% (2010)

60% (2007)

71% (2010)

64% (2011)

72% (2008)

62% (2007)