| Value | Category | Cases | |
|---|---|---|---|
| 1 | Surface | 183 |
0.4%
|
| 2 | Drip | 11336 |
27.4%
|
| 3 | Sprinklers | 544 |
1.3%
|
| 9 | not stated | 64 |
0.2%
|
| Sysmiss | 29301 |