| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| -7 | The establishment does not use water for production | 65 |
29.7%
|
| 1 | Yes | 30 |
13.7%
|
| 2 | No | 123 |
56.2%
|