| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.4%
|
| -7 | The establishment does not use water for production | 118 |
21.7%
|
| 1 | Yes | 10 |
1.8%
|
| 2 | No | 414 |
76.1%
|
| Sysmiss | 454 |