| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
3.7%
|
| -7 | The establishment does not use water for production | 18 |
3.9%
|
| 1 | Yes | 25 |
5.4%
|
| 2 | No | 403 |
87%
|
| Sysmiss | 633 |