| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    
| 0 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 1 | 15 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| 2 | 13 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 3 | 9 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 4 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 5 | 25 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    |
| 6 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 7 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 8 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 10 | 42 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 12 | 6 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 15 | 28 | 
                                                                 
                                    
                                    11.2%
                                 
                                                             | 
                                                        
                    |
| 17 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 18 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 20 | 45 | 
                                                                 
                                    
                                    17.9%
                                 
                                                             | 
                                                        
                    |
| 22 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 25 | 16 | 
                                                                 
                                    
                                    6.4%
                                 
                                                             | 
                                                        
                    |
| 30 | 26 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 32 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 35 | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 40 | 3 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 50 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 55 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 80 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 82 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 113 |