83% (2003)

67% (2006)

70% (2004)

72% (2005)

56% (2003)

60% (2005)

64% (2005)

58% (2007)

58% (2006)

54% (2004)

61% (2003)

66% (2006)

62% (2005)

70% (2008)

77% (2009)

50% (2005)