| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| -5 | Never | 0 | 
                                    
                                    0%
                                 | 
| 0 | Current sales are normal | 78 | 
                                    
                                    40.4%
                                 | 
| 2 | 2 | 
                                    
                                    1%
                                 | |
| 4 | 1 | 
                                    
                                    0.5%
                                 | |
| 6 | 30 | 
                                    
                                    15.5%
                                 | |
| 7 | 2 | 
                                    
                                    1%
                                 | |
| 8 | 3 | 
                                    
                                    1.6%
                                 | |
| 9 | 8 | 
                                    
                                    4.1%
                                 | |
| 10 | 5 | 
                                    
                                    2.6%
                                 | |
| 12 | 43 | 
                                    
                                    22.3%
                                 | |
| 13 | 3 | 
                                    
                                    1.6%
                                 | |
| 14 | 1 | 
                                    
                                    0.5%
                                 | |
| 16 | 2 | 
                                    
                                    1%
                                 | |
| 18 | 9 | 
                                    
                                    4.7%
                                 | |
| 24 | 6 | 
                                    
                                    3.1%
                                 | |
| Sysmiss | 49 |