53% (1997)

29% (2009)

44% (1995)

17% (2003)

31% (2006)

0% (2002)

47% (1993)

0% (2005)

70% (1998)

28% (1990)

69% (1993)

35% (1993)

0% (1999)

38% (2008)

0% (1970)