| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 110 |
14.6%
|
| -7 | The establishment does not use water for production | 24 |
3.2%
|
| 1 | Yes | 15 |
2%
|
| 2 | No | 603 |
80.2%
|
| Sysmiss | 821 |