55% (1990)

51% (1992)

41% (2001)

23% (2006)

47% (1996)

28% (2003)

29% (1989)

30% (1998)

52% (2002)

49% (1994)

10% (1994)

30% (2001)

13% (1997)

0% (2000)

0% (1996)