63% (2005)

64% (2010)

68% (2011)

65% (2009)

75% (2008)

49% (2004)

73% (2010)

60% (2003)

56% (2006)

67% (2010)

64% (2006)

55% (2005)

73% (2010)

65% (2008)

70% (2008)

40% (2005)

59% (2010)

59% (2011)

58% (2009)

62% (2007)