| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Less than one day | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 1 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 2 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 3 | 5 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 5 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 4 | 
                                                                 
                                    
                                    5.6%
                                 
                                                             | 
                                                        
                    |
| 6 | 2 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 7 | 15 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 11 | 
                                                                 
                                    
                                    15.3%
                                 
                                                             | 
                                                        
                    |
| 11 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 13 | 2 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 14 | 9 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    |
| 15 | 3 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 20 | 2 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 22 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 28 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 30 | 2 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 31 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 60 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 75 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 90 | 1 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 292 |