75% (2001)

66% (2004)

68% (2007)

70% (2002)

67% (2002)

69% (2005)

57% (2005)

58% (2007)

68% (2007)

64% (2005)

71% (2005)

61% (2002)

62% (2009)

58% (2006)

71% (2002)

62% (2004)

68% (2006)

66% (2006)

85% (2009)