| 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 |