| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    15%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Less than one day | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    
| 7 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 8 | 2 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    |
| 14 | 6 | 
                                                                 
                                    
                                    30%
                                 
                                                             | 
                                                        
                    |
| 20 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 21 | 2 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    |
| 30 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 44 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 60 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 240 | 1 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 94 |