| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 | 
                                    
                                    11.3%
                                 | 
| 0 | 17 | 
                                    
                                    32.1%
                                 | |
| 1 | 6 | 
                                    
                                    11.3%
                                 | |
| 2 | 3 | 
                                    
                                    5.7%
                                 | |
| 3 | 7 | 
                                    
                                    13.2%
                                 | |
| 4 | 1 | 
                                    
                                    1.9%
                                 | |
| 6 | 2 | 
                                    
                                    3.8%
                                 | |
| 8 | 1 | 
                                    
                                    1.9%
                                 | |
| 10 | 1 | 
                                    
                                    1.9%
                                 | |
| 11 | 1 | 
                                    
                                    1.9%
                                 | |
| 14 | 1 | 
                                    
                                    1.9%
                                 | |
| 22 | 1 | 
                                    
                                    1.9%
                                 | |
| 25 | 1 | 
                                    
                                    1.9%
                                 | |
| 28 | 1 | 
                                    
                                    1.9%
                                 | |
| 35 | 1 | 
                                    
                                    1.9%
                                 | |
| 40 | 1 | 
                                    
                                    1.9%
                                 | |
| 50 | 1 | 
                                    
                                    1.9%
                                 | |
| 54 | 1 | 
                                    
                                    1.9%
                                 | |
| Sysmiss | 162 |