| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
5.1%
|
| -7 | The establishment does not use water for production | 8 |
4.5%
|
| 1 | Yes | 3 |
1.7%
|
| 2 | No | 157 |
88.7%
|
| Sysmiss | 232 |