67% (2007)

69% (2011)

55% (2005)

70% (2005)

70% (2007)

65% (2012)

72% (2009)

66% (2009)

60% (2009)

75% (2006)

60% (2004)

76% (2011)

62% (2012)

67% (2006)

63% (2010)

67% (2010)

53% (2006)

61% (2008)

65% (2009)

54% (2008)