| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| 0 | 12 | 
                                                                 
                                    
                                    9.2%
                                 
                                                             | 
                                                        
                    |
| 1 | 8 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    |
| 2 | 17 | 
                                                                 
                                    
                                    13%
                                 
                                                             | 
                                                        
                    |
| 3 | 7 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 4 | 5 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 5 | 17 | 
                                                                 
                                    
                                    13%
                                 
                                                             | 
                                                        
                    |
| 6 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 7 | 5 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 8 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 10 | 10 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    |
| 11 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 12 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 13 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 14 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 15 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 16 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 20 | 6 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    |
| 21 | 3 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 25 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 26 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 30 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 38 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 50 | 5 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    |
| 51 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 430 | 1 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 257 |