72% (2010)

69% (2008)

61% (2005)

62% (2008)

62% (2009)

66% (2008)

69% (2008)

70% (2008)

64% (2008)

57% (2009)

63% (2010)

68% (2008)

67% (2010)

63% (2008)

63% (2009)

59% (2007)

64% (2009)

53% (2007)

74% (2006)

64% (2010)