74% (2005)

74% (2006)

64% (2008)

52% (2006)

62% (2011)

64% (2011)

62% (2011)

49% (2010)

69% (2005)

65% (2007)

63% (2005)

58% (2006)

60% (2006)

62% (2005)

60% (2006)

54% (2010)

60% (2007)