| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
8.1%
|
| -7 | The establishment does not use water for production | 7 |
4.7%
|
| 1 | Yes | 6 |
4.1%
|
| 2 | No | 123 |
83.1%
|
| Sysmiss | 123 |