30% (2006)

20% (2004)

55% (2006)

10% (2004)

10% (2003)

55% (2003)

10% (2002)

35% (2006)

0% (2003)

0% (2002)

34% (2003)

20% (2006)

15% (2006)

25% (2006)

40% (2005)

10% (2002)

20% (2006)

10% (2005)

60% (2006)

10% (2006)