|
| 高 | 较高 | 中 | 较低 | 低 |
| B11 | 0.5 | 0.3 | 0.1 | 0.1 | 0.0 |
| B12 | 0.2 | 0.2 | 0.3 | 0.1 | 0.2 |
| B13 | 0.4 | 0.2 | 0.2 | 0.1 | 0.1 |
| B21 | 0.2 | 0.3 | 0.2 | 0.2 | 0.1 |
| B22 | 0.2 | 0.3 | 0.2 | 0.2 | 0.1 |
| B23 | 0.1 | 0.3 | 0.4 | 0.1 | 0.1 |