74% (2008)

64% (2005)

68% (2011)

60% (2006)

65% (2009)

49% (2004)

63% (2010)

57% (2004)

75% (2010)

66% (2010)

65% (2008)

50% (2007)

73% (2010)

64% (2006)

75% (2008)

54% (2003)

70% (2008)

56% (2005)

73% (2010)

57% (2006)