83% (2003)

70% (2004)

67% (2006)

61% (2005)

73% (2005)

57% (2003)

58% (2006)

59% (2007)

62% (2003)

64% (2005)

54% (2004)

77% (2009)

70% (2008)

50% (2005)

62% (2005)

66% (2006)