74% (2011)

59% (2010)

66% (2009)

59% (2011)

75% (2001)

66% (2008)

57% (2008)

70% (2010)

71% (2010)

59% (2010)

61% (2008)

64% (2007)

74% (2008)

61% (2009)

57% (2005)

64% (2004)

73% (2003)

72% (2005)

45% (2004)

70% (2004)