83% (2003)

70% (2004)

67% (2006)

60% (2005)

58% (2006)

73% (2005)

63% (2005)

58% (2007)

56% (2003)

61% (2003)

77% (2009)

54% (2004)

62% (2005)

50% (2005)

66% (2006)

70% (2008)