| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 4 | 2 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 5 | 12 | 
                                                                 
                                    
                                    8.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 7 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    |
| 15 | 11 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 20 | 23 | 
                                                                 
                                    
                                    16.1%
                                 
                                                             | 
                                                        
                    |
| 25 | 6 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 30 | 17 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    |
| 35 | 3 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 40 | 11 | 
                                                                 
                                    
                                    7.7%
                                 
                                                             | 
                                                        
                    |
| 42 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 45 | 5 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 50 | 10 | 
                                                                 
                                    
                                    7%
                                 
                                                             | 
                                                        
                    |
| 60 | 4 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 70 | 5 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 75 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 80 | 4 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 90 | 3 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    |
| 100 | 16 | 
                                                                 
                                    
                                    11.2%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 66 |