| Industry | N | Avg | S.D. | Min | Max |
| B (采矿业) | 1 | 0.0168 | 0 | 0.0168 | 0.0168 |
| C (制造业) | 40 | 0.0544 | 0.0606 | 0.0004 | 0.2500 |
| F (批发和零售业) | 2 | 0.0402 | 0.0002 | 0.0404 | 0.0404 |
| G (仓储业) | 1 | 0.0077 | 0 | 0.0077 | 0.0077 |
| I (信息业) | 10 | 0.1184 | 0.1679 | 0.0099 | 0.5731 |
| L (商务租赁业) | 2 | 0.0607 | 0.0844 | 0.0011 | 0.1204 |
| N (公共服务业) | 1 | 0.0310 | 0 | 0.0310 | 0.0310 |
| Q (卫生) | 1 | 0.0049 | 0 | 0.0049 | 0.0049 |