51% (2007)

63% (2005)

69% (2008)

54% (2005)

44% (2008)

64% (2003)

74% (2007)

62% (2003)

71% (2007)

52% (2002)

68% (2007)

62% (2003)

50% (2004)

50% (2003)

58% (2005)

59% (2007)

74% (2006)

60% (2006)

53% (2007)

76% (2006)