0% (2009)

55% (2001)

0% (2007)

55% (2008)

10% (2010)

10% (2007)

10% (2006)

10% (2007)

43% (2003)

10% (2005)

0% (2009)

37% (1996)

10% (2005)

10% (1998)

20% (2006)

67% (2006)

50% (2003)

25% (1997)

20% (2008)

35% (2005)