| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 759 | 
                                                                 
                                    
                                    52.6%
                                 
                                                             | 
                                                        
                    
| 0 | 228 | 
                                                                 
                                    
                                    15.8%
                                 
                                                             | 
                                                        
                    |
| 1 | 15 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 2 | 11 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 3 | 4 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 5 | 10 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 10 | 28 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 15 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 17 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 20 | 20 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 25 | 5 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 30 | 32 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 35 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 40 | 17 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 45 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 50 | 80 | 
                                                                 
                                    
                                    5.5%
                                 
                                                             | 
                                                        
                    |
| 60 | 24 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 65 | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 70 | 20 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 75 | 17 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 80 | 22 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 85 | 5 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 90 | 12 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 95 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 100 | 125 | 
                                                                 
                                    
                                    8.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 1512 |