37% (2004)

10% (2005)

10% (2006)

0% (2007)

0% (2004)

0% (2004)

10% (2008)

0% (2009)

10% (2003)

25% (1997)

64% (2011)

35% (2006)

10% (2009)

25% (2006)

37% (1996)

55% (2008)

10% (1998)

25% (2006)

20% (2009)

100% (2002)