57% (2009)

60% (2007)

52% (2007)

42% (2006)

0% (2005)

50% (2009)

76% (2008)

46% (2008)

0% (2007)

0% (2010)

63% (2008)

52% (2008)

0% (2007)

60% (2009)

39% (2006)

0% (2007)

0% (2008)

50% (2006)

0% (2009)

20% (2008)