83% (2003)

70% (2004)

61% (2005)

68% (2006)

72% (2005)

56% (2003)

64% (2005)

61% (2007)

58% (2006)

57% (2003)

54% (2004)

62% (2005)

66% (2006)

74% (2009)

50% (2005)

70% (2008)