| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 18 | 
                                                                 
                                    
                                    7%
                                 
                                                             | 
                                                        
                    
| 0 | 10 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 1 | 16 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    |
| 2 | 24 | 
                                                                 
                                    
                                    9.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 21 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    |
| 4 | 10 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 5 | 33 | 
                                                                 
                                    
                                    12.8%
                                 
                                                             | 
                                                        
                    |
| 6 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 7 | 9 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 8 | 6 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 9 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 10 | 20 | 
                                                                 
                                    
                                    7.8%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 13 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 15 | 9 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 16 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 17 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 18 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 20 | 12 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 21 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 22 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 24 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 25 | 10 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    |
| 27 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 30 | 12 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 35 | 7 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 40 | 4 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    |
| 45 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 48 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 50 | 5 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 52 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 55 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 56 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 60 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 335 |