| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 670 | 2701 |
82.3%
|
| 2 | Special tools | 42 | 62 |
1.9%
|
| 3 | Both methods | 34 | 42 |
1.3%
|
| Sysmiss | 114 | 477 |