67% (2011)

64% (2009)

57% (2008)

76% (2010)

63% (2010)

69% (2004)

67% (2007)

65% (2009)

61% (2011)

72% (2009)

60% (2010)

59% (2010)

60% (2010)

67% (2008)

64% (2007)

56% (2006)

59% (2008)

64% (2004)

70% (2010)

60% (2011)