72% (1998)

73% (1995)

66% (1998)

65% (1997)

55% (2000)

64% (1997)

48% (1995)

71% (1996)

60% (1994)

64% (1997)

43% (1999)

67% (1996)

50% (1993)

47% (1997)

50% (1996)

64% (2000)

69% (2001)

38% (1994)

52% (1995)

67% (1996)