| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 108 | 6781 |
5.4%
|
| 2 | Special tools | 72 | 891 |
0.7%
|
| 3 | Both methods | 7 | 415 |
0.3%
|
| Sysmiss | 3118 | 116988 |