| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not used very often, or used for a small part of the area irrigated | 4 |
1%
|
| 2 | Used for a significant part of the area irrigated | 7 |
1.8%
|
| 3 | Main irrigation method used | 374 |
97.1%
|
| Sysmiss | 5270 |