67% (2007)

76% (2011)

78% (2010)

64% (2011)

69% (2011)

62% (2012)

74% (2007)

70% (2007)

65% (2009)

65% (2011)

52% (2006)

70% (2009)

72% (2009)

69% (2009)

67% (2010)

66% (2009)

64% (2003)

70% (2005)

59% (2011)

63% (2001)