57% (2005)

60% (2004)

59% (2006)

74% (2003)

49% (2007)

59% (2007)

63% (2003)

62% (2004)

68% (2005)

46% (2005)

60% (2002)

56% (2003)

71% (2007)

52% (2001)

51% (2001)

58% (2005)

53% (2003)

41% (2003)

40% (2002)

58% (2007)