67% (2003)

61% (2007)

60% (2006)

70% (2007)

58% (2005)

63% (2005)

65% (2005)

56% (2004)

61% (2004)

62% (2005)

58% (2007)

43% (2008)

51% (2007)

44% (2005)

50% (2004)

47% (2007)

65% (2006)

52% (2005)

44% (2008)

74% (2007)