| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than one day | 0 | 
                                    
                                    0%
                                 | 
| 1 | 2 | 
                                    
                                    4.7%
                                 | |
| 2 | 1 | 
                                    
                                    2.3%
                                 | |
| 3 | 3 | 
                                    
                                    7%
                                 | |
| 5 | 2 | 
                                    
                                    4.7%
                                 | |
| 7 | 2 | 
                                    
                                    4.7%
                                 | |
| 9 | 1 | 
                                    
                                    2.3%
                                 | |
| 10 | 2 | 
                                    
                                    4.7%
                                 | |
| 12 | 2 | 
                                    
                                    4.7%
                                 | |
| 13 | 2 | 
                                    
                                    4.7%
                                 | |
| 14 | 23 | 
                                    
                                    53.5%
                                 | |
| 21 | 2 | 
                                    
                                    4.7%
                                 | |
| 22 | 1 | 
                                    
                                    2.3%
                                 | |
| Sysmiss | 107 |