| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 13 | 
                                                                 
                                    
                                    16.9%
                                 
                                                             | 
                                                        
                    
| 0 | Less than one day | 14 | 
                                                                 
                                    
                                    18.2%
                                 
                                                             | 
                                                        
                    
| 1 | 14 | 
                                                                 
                                    
                                    18.2%
                                 
                                                             | 
                                                        
                    |
| 2 | 8 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 3 | 7 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 4 | 2 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 5 | 4 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 3 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 8 | 2 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 10 | 3 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 14 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 21 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 28 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 56 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 60 | 1 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 532 |