| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manual | 1031 | 1269 |
28.8%
|
| 2 | Special tools | 90 | 119 |
2.7%
|
| 3 | Both methods | 119 | 184 |
4.2%
|
| Sysmiss | 2330 | 2831 |