| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
0.9%
|
| -7 | The establishment does not use water for production | 127 |
14.3%
|
| 1 | Yes | 26 |
2.9%
|
| 2 | No | 728 |
81.9%
|
| Sysmiss | 434 |