65% (2009)

60% (2010)

63% (2009)

71% (2007)

62% (2013)

62% (2008)

72% (2011)

63% (2008)

61% (2008)

73% (2006)

59% (2011)

63% (2010)

63% (2012)

60% (2011)

65% (2008)

62% (2012)

66% (2012)

62% (2010)

67% (2009)

62% (2008)