67% (2007)

75% (2011)

70% (2009)

70% (2011)

78% (2010)

70% (2007)

75% (2006)

62% (2012)

71% (2005)

60% (2004)

70% (2011)

66% (2009)

63% (2010)

60% (2009)

74% (2007)

55% (2005)

52% (2006)

71% (2006)

63% (2006)

63% (2001)