46% (1998)

46% (1997)

33% (1997)

57% (1998)

51% (1996)

60% (1999)

48% (1996)

38% (1998)

43% (1995)

47% (1998)

10% (1997)

64% (1998)

54% (1997)

45% (1996)

37% (1996)

47% (1999)

58% (1998)

35% (1997)

15% (1995)

39% (1997)