70% (2009)

76% (2007)

72% (2004)

62% (2005)

57% (2008)

69% (2012)

56% (2009)

58% (2008)

75% (2007)

62% (2002)

59% (2002)

70% (2009)

63% (2008)

57% (2010)

57% (2006)

59% (2009)

50% (2008)

68% (2007)

70% (2009)

62% (2008)