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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 13 | 16 |
I级 | 频数 | 2180 | 998 | 537 | 269 | 144 | 70 | 24 | 25 | 5 |
| 1 |
比重 | 51.3% | 23.5% | 12.6% | 6.3% | 3.4% | 1.6% | 0.6% | 0.6% | 0.1% |
| 0.02% | |
II级 | 频数 | 65 | 93 | 57 | 40 | 27 | 16 | 7 | 3 | 3 | 1 |
|
比重 | 20.8% | 29.8% | 18.3% | 12.8% | 8.7% | 5.1% | 2.2% | 0.9% | 0.9% | 0.3% |
| |
IV级 | 频数 | 25 | 35 | 23 | 8 | 5 | 3 | 1 | 1 |
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|
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比重 | 24.8% | 34.6% | 22.8% | 7.9% | 4.9% | 3.0% | 1.0% | 1.0% |
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| |
V级 | 频数 | 22 | 13 | 16 | 10 | 10 | 6 | 3 |
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|
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比重 | 27.5% | 16.3% | 20.0% | 12.5% | 12.5% | 7.5 | 3.7 |
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| |
I-V级 | 频数 | 2292 | 1139 | 633 | 327 | 186 | 95 | 35 | 29 | 8 | 1 | 1 |
| 比重 | 48.3% | 24.0% | 13.4% | 6.9% | 3.9% | 2.0% | 0.7% | 0.6% | 0.2% |
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