| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manually | 783 | 862 |
35.7%
|
| 2 | Special vehicles | 44 | 59 |
2.5%
|
| 3 | Both methods | 47 | 53 |
2.2%
|
| 4 | Other | 1 | 1 |
0%
|
| Sysmiss | 1297 | 1436 |