| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 156 | 352 |
9.9%
|
| 2 | Special tools | 5 | 8 |
0.2%
|
| 3 | Both methods | 12 | 13 |
0.4%
|
| Sysmiss | 574 | 3179 |