| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| -7 | Does not apply (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than one day | 2 | 
                                    
                                    4.3%
                                 | 
| 2 | 1 | 
                                    
                                    2.1%
                                 | |
| 3 | 2 | 
                                    
                                    4.3%
                                 | |
| 4 | 2 | 
                                    
                                    4.3%
                                 | |
| 5 | 4 | 
                                    
                                    8.5%
                                 | |
| 7 | 5 | 
                                    
                                    10.6%
                                 | |
| 10 | 5 | 
                                    
                                    10.6%
                                 | |
| 12 | 1 | 
                                    
                                    2.1%
                                 | |
| 14 | 2 | 
                                    
                                    4.3%
                                 | |
| 15 | 5 | 
                                    
                                    10.6%
                                 | |
| 21 | 1 | 
                                    
                                    2.1%
                                 | |
| 25 | 4 | 
                                    
                                    8.5%
                                 | |
| 30 | 4 | 
                                    
                                    8.5%
                                 | |
| 45 | 3 | 
                                    
                                    6.4%
                                 | |
| 50 | 2 | 
                                    
                                    4.3%
                                 | |
| 60 | 3 | 
                                    
                                    6.4%
                                 | |
| 90 | 1 | 
                                    
                                    2.1%
                                 | |
| Sysmiss | 1369 |