51% (1992)

40% (2001)

47% (1996)

29% (1989)

23% (2006)

49% (1994)

55% (1990)

30% (1998)

30% (2001)

52% (2002)

29% (2003)

13% (1997)

15% (1994)

0% (2000)

0% (1996)