74% (2001)

66% (2004)

67% (2007)

69% (2002)

57% (2006)

68% (2007)

60% (2002)

71% (2005)

64% (2005)

66% (2006)

67% (2002)

61% (2009)

62% (2004)

57% (2005)

69% (2005)

68% (2006)

59% (2007)

70% (2002)

61% (2002)

61% (2005)