20% (2006)

0% (2007)

20% (2008)

0% (2009)

0% (2002)

0% (2002)

53% (2002)

10% (2005)

25% (2001)

50% (2003)

27% (2006)

30% (1998)

25% (2006)

20% (2005)

10% (2009)

10% (2003)

35% (2006)

10% (2005)

30% (2005)

0% (2004)