55% (1997)

38% (1997)

45% (1997)

35% (1996)

56% (1994)

34% (1996)

47% (1995)

45% (1996)

47% (1996)

0% (1998)

39% (2005)

42% (1995)

38% (1999)

32% (1999)

52% (1995)

39% (2008)