| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 189 |
1.5%
|
| -7 | The establishment does not use water for production | 495 |
3.9%
|
| 1 | Yes | 363 |
2.9%
|
| 2 | No | 11535 |
91.7%
|
| Sysmiss | 6075 |