67% (2007)

78% (2010)

70% (2007)

76% (2011)

70% (2011)

62% (2012)

66% (2009)

70% (2005)

74% (2006)

71% (2006)

56% (2005)

63% (2006)

74% (2007)

60% (2004)

62% (2010)

65% (2011)

64% (2011)

63% (2001)

65% (2009)

58% (2003)