| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                                                 
                                    
                                    9.3%
                                 
                                                             | 
                                                        
                    
| -7 | Establishment was not in business | 88 | 
                                                                 
                                    
                                    90.7%
                                 
                                                             |