64% (2005)

68% (2011)

63% (2010)

60% (2006)

65% (2009)

74% (2010)

64% (2006)

73% (2010)

75% (2008)

48% (2004)

56% (2006)

49% (2007)

59% (2011)

65% (2008)

73% (2010)

56% (2006)

65% (2008)

63% (2005)

40% (2005)

69% (2008)