| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 58 | 242 |
6.8%
|
| 2 | Special tools | 3 | 3 |
0.1%
|
| 3 | Both methods | 5 | 6 |
0.2%
|
| Sysmiss | 681 | 3300 |