| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    4.2%
                                 | 
| 8 | 1 | 
                                    
                                    4.2%
                                 | |
| 13 | 1 | 
                                    
                                    4.2%
                                 | |
| 14 | 1 | 
                                    
                                    4.2%
                                 | |
| 18 | 1 | 
                                    
                                    4.2%
                                 | |
| 19 | 2 | 
                                    
                                    8.3%
                                 | |
| 22 | 1 | 
                                    
                                    4.2%
                                 | |
| 25 | 2 | 
                                    
                                    8.3%
                                 | |
| 27 | 2 | 
                                    
                                    8.3%
                                 | |
| 30 | 1 | 
                                    
                                    4.2%
                                 | |
| 35 | 2 | 
                                    
                                    8.3%
                                 | |
| 37 | 1 | 
                                    
                                    4.2%
                                 | |
| 46 | 1 | 
                                    
                                    4.2%
                                 | |
| 50 | 2 | 
                                    
                                    8.3%
                                 | |
| 52 | 1 | 
                                    
                                    4.2%
                                 | |
| 67 | 1 | 
                                    
                                    4.2%
                                 | |
| 68 | 1 | 
                                    
                                    4.2%
                                 | |
| 74 | 1 | 
                                    
                                    4.2%
                                 | |
| 79 | 1 | 
                                    
                                    4.2%
                                 | |
| Sysmiss | 339 |