30% (2003)

30% (2001)

10% (2009)

0% (2004)

20% (2009)

10% (2010)

20% (2007)

50% (1997)

0% (2007)

0% (2009)

50% (2005)

20% (2005)

10% (2003)

44% (2006)

35% (2005)

20% (2009)

35% (2006)

0% (2005)

10% (2005)

0% (2004)