67% (2007)

78% (2010)

76% (2011)

70% (2007)

75% (2006)

69% (2011)

63% (2010)

62% (2012)

70% (2005)

71% (2006)

70% (2011)

73% (2007)

65% (2009)

55% (2005)

70% (2005)

63% (2006)

60% (2009)

60% (2004)

69% (2009)

65% (2011)