64% (2010)

64% (2005)

68% (2011)

73% (2010)

60% (2003)

49% (2004)

65% (2009)

56% (2006)

75% (2008)

64% (2006)

65% (2008)

59% (2010)

59% (2011)

70% (2008)

67% (2010)

62% (2007)

56% (2006)

73% (2010)

55% (2005)

47% (2010)