10% (2006)

0% (2003)

10% (2005)

0% (2009)

30% (2007)

10% (2007)

0% (2009)

32% (2009)

42% (2006)

44% (2008)

30% (2004)

50% (2011)

73% (2011)

0% (2007)

20% (2009)

80% (2004)

20% (2007)

20% (2009)

0% (2007)

10% (2008)