| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Manually | 160 | 2176 |
90.8%
|
| 2 | Special vehicles | 18 | 168 |
7%
|
| 3 | Both methods | 14 | 46 |
1.9%
|
| 4 | Other | 2 | 8 |
0.3%
|