68% (2012)

70% (2009)

71% (2004)

76% (2007)

62% (2005)

57% (2008)

57% (2008)

63% (2008)

75% (2007)

68% (2009)

61% (2002)

57% (2009)

59% (2002)

57% (2006)

57% (2010)

59% (2009)

50% (2008)

68% (2007)

70% (2009)

62% (2008)