69% (2009)

70% (2012)

49% (2008)

61% (2009)

56% (2009)

65% (2010)

38% (2008)

61% (2009)

50% (2012)

72% (2009)

40% (2007)

0% (2010)

40% (2010)

0% (2008)

50% (2007)

60% (2006)