0% (2008)

40% (2006)

55% (2010)

0% (2009)

57% (2009)

0% (1990)

0% (1996)

0% (2004)

10% (1999)

35% (2002)

0% (1987)

55% (2010)

30% (2011)

0% (2008)

0% (2007)

15% (2010)

0% (1992)

80% (2009)

0% (2003)

0% (1997)