74% (2005)

69% (2005)

74% (2006)

66% (2007)

62% (2011)

52% (2006)

54% (2010)

64% (2011)

48% (2009)

65% (2008)

62% (2011)

62% (2005)

63% (2005)

60% (2006)

60% (2006)

58% (2006)

60% (2007)