67% (2007)

75% (2006)

76% (2011)

68% (2004)

70% (2007)

71% (2006)

63% (2010)

70% (2011)

55% (2005)

61% (2012)

54% (2012)

72% (2004)

72% (2009)

54% (2005)

59% (2004)

64% (2011)

65% (2009)

60% (2009)

75% (2003)

64% (2009)