| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    8.1%
                                 | 
| 0 | Less than one day | 0 | 
                                    
                                    0%
                                 | 
| 2 | 2 | 
                                    
                                    5.4%
                                 | |
| 4 | 1 | 
                                    
                                    2.7%
                                 | |
| 5 | 1 | 
                                    
                                    2.7%
                                 | |
| 7 | 1 | 
                                    
                                    2.7%
                                 | |
| 10 | 2 | 
                                    
                                    5.4%
                                 | |
| 12 | 1 | 
                                    
                                    2.7%
                                 | |
| 14 | 4 | 
                                    
                                    10.8%
                                 | |
| 15 | 1 | 
                                    
                                    2.7%
                                 | |
| 19 | 1 | 
                                    
                                    2.7%
                                 | |
| 21 | 3 | 
                                    
                                    8.1%
                                 | |
| 30 | 2 | 
                                    
                                    5.4%
                                 | |
| 31 | 1 | 
                                    
                                    2.7%
                                 | |
| 37 | 1 | 
                                    
                                    2.7%
                                 | |
| 38 | 1 | 
                                    
                                    2.7%
                                 | |
| 39 | 1 | 
                                    
                                    2.7%
                                 | |
| 45 | 2 | 
                                    
                                    5.4%
                                 | |
| 60 | 3 | 
                                    
                                    8.1%
                                 | |
| 67 | 1 | 
                                    
                                    2.7%
                                 | |
| 70 | 1 | 
                                    
                                    2.7%
                                 | |
| 82 | 1 | 
                                    
                                    2.7%
                                 | |
| 90 | 2 | 
                                    
                                    5.4%
                                 | |
| 93 | 1 | 
                                    
                                    2.7%
                                 | |
| Sysmiss | 74 |