76% (1996)

68% (2000)

54% (1999)

50% (1998)

46% (2000)

67% (2000)

67% (1998)

25% (1998)

63% (2000)

61% (1997)

68% (1992)

52% (1998)

55% (2001)

70% (1998)

43% (1994)

40% (1996)

30% (1996)

15% (1995)