0% (1992)

55% (2010)

0% (2005)

60% (2002)

0% (1987)

0% (2004)

57% (2009)

10% (1999)

0% (2009)

0% (2011)

0% (1996)

0% (2010)

0% (2004)

60% (2001)

0% (2007)

80% (2009)

0% (2008)

40% (2006)

0% (2008)

0% (2004)