68% (1996)

40% (2002)

43% (1999)

55% (2000)

37% (1997)

25% (1998)

10% (1998)

41% (1985)

35% (1985)

10% (1998)

39% (1995)

28% (1997)

30% (1996)

48% (1999)

58% (1997)

24% (1997)

20% (1996)

40% (1996)

29% (2000)

24% (1996)