76% (1996)

69% (2000)

50% (1998)

53% (1999)

54% (1998)

46% (2000)

67% (2000)

55% (2001)

66% (1998)

25% (1998)

71% (1998)

60% (1997)

68% (1992)

15% (1995)

63% (2000)

40% (1996)

50% (1994)

30% (1996)