| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    3.3%
                                 | 
| 0 | 59 | 
                                    
                                    39.3%
                                 | |
| 1 | 37 | 
                                    
                                    24.7%
                                 | |
| 2 | 20 | 
                                    
                                    13.3%
                                 | |
| 3 | 7 | 
                                    
                                    4.7%
                                 | |
| 4 | 7 | 
                                    
                                    4.7%
                                 | |
| 5 | 4 | 
                                    
                                    2.7%
                                 | |
| 6 | 2 | 
                                    
                                    1.3%
                                 | |
| 7 | 2 | 
                                    
                                    1.3%
                                 | |
| 8 | 1 | 
                                    
                                    0.7%
                                 | |
| 9 | 1 | 
                                    
                                    0.7%
                                 | |
| 10 | 1 | 
                                    
                                    0.7%
                                 | |
| 40 | 1 | 
                                    
                                    0.7%
                                 | |
| 48 | 1 | 
                                    
                                    0.7%
                                 | |
| 50 | 1 | 
                                    
                                    0.7%
                                 | |
| 96 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 213 |