| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| -7 | Does not apply (spontaneous) | 2 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    
| 0 | Less than one day | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 3 | 3 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    |
| 4 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 5 | 
                                                                 
                                    
                                    9.3%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 7 | 4 | 
                                                                 
                                    
                                    7.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 2 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 14 | 23 | 
                                                                 
                                    
                                    42.6%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 16 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 20 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 21 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 25 | 2 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 30 | 2 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 31 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 35 | 2 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 40 | 1 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 334 |