67% (2003)

66% (2005)

68% (2004)

70% (2007)

43% (2008)

61% (2007)

62% (2005)

69% (2008)

47% (2007)

66% (2006)

44% (2005)

53% (2007)

55% (2005)

56% (2004)

59% (2005)

57% (2007)

72% (2005)

64% (2006)

51% (2005)

65% (2005)