50% (2006)

61% (2004)

56% (2007)

59% (2007)

65% (2005)

71% (2004)

53% (2006)

58% (2006)

48% (2004)

59% (2007)

31% (1999)

56% (2006)

44% (2005)

50% (2004)

38% (2003)