71% (2004)

64% (2007)

51% (2011)

70% (2009)

66% (2008)

62% (2003)

59% (2011)

54% (2008)

64% (2008)

69% (2009)

60% (2008)

57% (2010)

64% (2004)

71% (2004)

58% (2004)

59% (2011)

63% (2003)

70% (2011)

58% (2005)

55% (2007)