| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | The establishment does not use water for production | 20 |
4.4%
|
| 1 | Yes | 49 |
10.9%
|
| 2 | No | 381 |
84.7%
|
| Sysmiss | 537 |