| Value | Category | Cases | |
|---|---|---|---|
| 1 | Surface | 225 |
0.7%
|
| 2 | Drip | 982 |
2.9%
|
| 3 | Sprinklers | 285 |
0.8%
|
| 9 | not stated | 11 |
0%
|
| Sysmiss | 32068 |