25% (2005)

40% (2015)

38% (2002)

35% (2012)

34% (2009)

60% (1999)

0% (2006)

50% (2006)

0% (2000)

0% (2003)

100% (1994)

0% (1996)

0% (2005)

0% (2006)

0% (2001)

0% (1993)

60% (2005)

0% (2002)

0% (2006)

60% (2004)