| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 49 | 
                                                                 
                                    
                                    14.5%
                                 
                                                             | 
                                                        
                    
| 2 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 2 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 7 | 9 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 2 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 10 | 23 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    |
| 12 | 5 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 14 | 8 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 15 | 47 | 
                                                                 
                                    
                                    13.9%
                                 
                                                             | 
                                                        
                    |
| 16 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 18 | 3 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 20 | 69 | 
                                                                 
                                    
                                    20.4%
                                 
                                                             | 
                                                        
                    |
| 21 | 6 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    |
| 25 | 3 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 30 | 66 | 
                                                                 
                                    
                                    19.5%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 40 | 7 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 45 | 5 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 60 | 24 | 
                                                                 
                                    
                                    7.1%
                                 
                                                             | 
                                                        
                    |
| 90 | 4 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 120 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 150 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 395 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 877 |