58% (1996)

40% (1994)

62% (1990)

71% (1996)

57% (1989)

55% (1999)

80% (1998)

64% (1997)

80% (1995)

64% (2000)

60% (1990)

64% (1997)

52% (1991)

38% (1998)

75% (1996)

50% (1996)

60% (1988)

50% (1993)

100% (1998)

60% (1994)