71% (2007)

63% (2013)

62% (2008)

65% (2009)

63% (2009)

60% (2010)

62% (2008)

63% (2008)

60% (2011)

62% (2012)

63% (2010)

73% (2006)

72% (2011)

59% (2011)

63% (2012)

62% (2008)

68% (2009)

65% (2008)

58% (2007)

59% (2009)