| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    
| 0 | 373 | 
                                                                 
                                    
                                    64.4%
                                 
                                                             | 
                                                        
                    |
| 1 | 4 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 3 | 2 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 5 | 8 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 10 | 20 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 15 | 7 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 20 | 17 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 25 | 3 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 30 | 18 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 40 | 13 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 50 | 29 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 55 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 60 | 8 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 63 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 70 | 8 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 75 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 80 | 11 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 90 | 6 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 95 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 100 | 27 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 2 |