| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| 3 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 7 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 10 | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 14 | 4 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 15 | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 20 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 21 | 5 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 25 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 28 | 5 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 30 | 22 | 
                                                                 
                                    
                                    23.9%
                                 
                                                             | 
                                                        
                    |
| 31 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 32 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 35 | 5 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    |
| 36 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 37 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 38 | 2 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 40 | 4 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 44 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 45 | 8 | 
                                                                 
                                    
                                    8.7%
                                 
                                                             | 
                                                        
                    |
| 48 | 4 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 55 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 60 | 12 | 
                                                                 
                                    
                                    13%
                                 
                                                             | 
                                                        
                    |
| 61 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| 90 | 3 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 120 | 1 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 272 |