| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 57 |
5.7%
|
| -7 | The establishment does not use water for production | 50 |
5%
|
| 1 | Yes | 13 |
1.3%
|
| 2 | No | 880 |
88%
|
| Sysmiss | 369 |