80% (2007)

81% (2007)

79% (2007)

58% (2008)

61% (2009)

64% (2011)

69% (2008)

63% (2010)

64% (2009)

59% (2010)

69% (2006)

68% (2007)

55% (2009)

58% (2005)

64% (2007)

71% (2009)

66% (2008)

68% (2008)

63% (2008)

62% (2011)