0% (2003)

20% (2009)

77% (2002)

20% (2008)

20% (2000)

20% (2003)

0% (1994)

70% (2007)

100% (1998)

33% (2004)

100% (1989)

0% (1990)

0% (1991)

0% (2010)

0% (1995)

0% (1992)

0% (2006)

0% (2007)

60% (2011)

60% (1970)