6-11ҪȾվֵ(1991-2008),,,,,,
,,,,,,
,,,,,,λ/
,,,,,,
,,,,,,
,,,,,,
1991,,0.126,,0.109,,0.310
1992,,0.132,,0.119,,0.380
1993,,0.120,,0.109,,0.348
1994,,0.110,,0.120,,0.395
1995,,0.090,,0.122,,0.377
,,,,,,
1996,,0.125,,0.133,,0.371
1997,,0.120,,0.152,,0.378
1998,,0.080,,0.140,,0.364
1999,,0.071,,0.126,,0.353
,,,,,,
,,,,,,
,,,,,,
