| NO. | Year | Comprehensive efficiency | Pure technical efficiency | Scale efficiency | Return to scale |
| 1 | 2017 | 1.000 | 1.000 | 1.000 | - |
| 2 | 2018 | 0.973 | 1.000 | 0.973 | drs |
| 3 | 2019 | 0.997 | 1.000 | 0.997 | drs |
| 4 | 2020 | 0.989 | 0.993 | 0.996 | drs |
| 5 | 2021 | 1.000 | 1.000 | 1.000 | - |
|
| Mean | 0.992 | 0.999 | 0.993 |
|