75% (2007)

61% (2003)

38% (2001)

42% (2004)

43% (2002)

34% (1999)

46% (2004)

49% (2005)

53% (2006)

71% (2007)

51% (2003)

44% (2006)

54% (2006)

31% (2000)

33% (2004)

65% (2006)

40% (2004)

61% (2010)

43% (2005)

0% (2005)