| Industry | N | Avg | S.D. | Min | Max |
| B (采矿业) | 1 | 0.0132 | 0 | 0.0132 | 0.0132 |
| C (制造业) | 40 | 0.0479 | 0.0711 | 0.0002 | 0.1914 |
| F (批发和零售业) | 2 | 0.0436 | 0.0003 | 0.0388 | 0.0522 |
| G (仓储业) | 1 | 0.0075 | 0 | 0.0075 | 0.0075 |
| I (信息业) | 10 | 0.1072 | 0.1556 | 0.0082 | 0.6874 |
| L (商务租赁业) | 2 | 0.0636 | 0.0773 | 0.0024 | 0.1290 |
| N (公共服务业) | 1 | 0.0300 | 0 | 0.0300 | 0.0300 |
| Q (卫生) | 1 | 0.0033 | 0 | 0.0033 | 0.0033 |