| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 | 
                                    
                                    31.8%
                                 | 
| -7 | Does not apply (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than one day | 2 | 
                                    
                                    9.1%
                                 | 
| 1 | 1 | 
                                    
                                    4.5%
                                 | |
| 2 | 1 | 
                                    
                                    4.5%
                                 | |
| 3 | 2 | 
                                    
                                    9.1%
                                 | |
| 7 | 4 | 
                                    
                                    18.2%
                                 | |
| 10 | 1 | 
                                    
                                    4.5%
                                 | |
| 14 | 1 | 
                                    
                                    4.5%
                                 | |
| 21 | 2 | 
                                    
                                    9.1%
                                 | |
| 60 | 1 | 
                                    
                                    4.5%
                                 | |
| Sysmiss | 193 |