67% (2003)

56% (2004)

62% (2005)

68% (2004)

70% (2007)

64% (2008)

61% (2007)

72% (2005)

62% (2007)

47% (2007)

65% (2006)

64% (2003)

51% (2005)

61% (2006)

66% (2005)

43% (2008)

65% (2005)

61% (2004)

51% (2005)

62% (2006)