70% (2009)

62% (2005)

76% (2007)

72% (2004)

57% (2008)

57% (2008)

68% (2012)

57% (2006)

68% (2007)

58% (2010)

75% (2007)

61% (2002)

68% (2009)

59% (2002)

63% (2008)

56% (2009)

50% (2008)

58% (2009)

62% (2008)

70% (2009)