| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2.7%
|
| -7 | The establishment does not use water for production | 42 |
28.8%
|
| 1 | Yes | 21 |
14.4%
|
| 2 | No | 79 |
54.1%
|
| Sysmiss | 231 |