67% (2007)

78% (2010)

70% (2011)

70% (2007)

76% (2011)

66% (2009)

75% (2006)

62% (2012)

70% (2005)

71% (2006)

56% (2005)

60% (2004)

74% (2002)

70% (2011)

71% (2005)

73% (2007)

63% (2001)

60% (2011)

63% (2006)

65% (2011)