| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 |
5.7%
|
| -7 | The establishment does not use water for production | 43 |
11.6%
|
| 1 | Yes | 108 |
29.1%
|
| 2 | No | 199 |
53.6%
|
| Sysmiss | 648 |