47% (1996)

52% (1992)

41% (2001)

55% (1990)

29% (1989)

13% (1997)

52% (2002)

23% (2006)

28% (2003)

49% (1994)

30% (1998)

30% (2001)

0% (1996)

10% (1994)

0% (2000)