| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
7.5%
|
| -7 | The establishment does not use water for production | 4 |
3%
|
| 1 | Yes | 16 |
12%
|
| 2 | No | 103 |
77.4%
|
| Sysmiss | 227 |