64% (2009)

63% (2013)

60% (2010)

63% (2009)

62% (2008)

71% (2007)

62% (2008)

63% (2008)

58% (2011)

62% (2012)

61% (2008)

57% (2007)

73% (2006)

60% (2011)

72% (2011)

67% (2009)

65% (2008)

62% (2010)

63% (2010)

63% (2007)