| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.7%
|
| -7 | The establishment does not use water for production | 8 |
6%
|
| 1 | Yes | 4 |
3%
|
| 2 | No | 117 |
87.3%
|
| Sysmiss | 228 |