| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    3.3%
                                 | 
| 0 | 50 | 
                                    
                                    33.3%
                                 | |
| 1 | 16 | 
                                    
                                    10.7%
                                 | |
| 2 | 20 | 
                                    
                                    13.3%
                                 | |
| 3 | 11 | 
                                    
                                    7.3%
                                 | |
| 4 | 6 | 
                                    
                                    4%
                                 | |
| 5 | 5 | 
                                    
                                    3.3%
                                 | |
| 6 | 6 | 
                                    
                                    4%
                                 | |
| 7 | 5 | 
                                    
                                    3.3%
                                 | |
| 8 | 2 | 
                                    
                                    1.3%
                                 | |
| 9 | 2 | 
                                    
                                    1.3%
                                 | |
| 10 | 1 | 
                                    
                                    0.7%
                                 | |
| 11 | 3 | 
                                    
                                    2%
                                 | |
| 12 | 2 | 
                                    
                                    1.3%
                                 | |
| 15 | 2 | 
                                    
                                    1.3%
                                 | |
| 16 | 1 | 
                                    
                                    0.7%
                                 | |
| 18 | 1 | 
                                    
                                    0.7%
                                 | |
| 20 | 2 | 
                                    
                                    1.3%
                                 | |
| 29 | 1 | 
                                    
                                    0.7%
                                 | |
| 44 | 2 | 
                                    
                                    1.3%
                                 | |
| 68 | 1 | 
                                    
                                    0.7%
                                 | |
| 70 | 2 | 
                                    
                                    1.3%
                                 | |
| 145 | 1 | 
                                    
                                    0.7%
                                 | |
| 270 | 1 | 
                                    
                                    0.7%
                                 | |
| 299 | 1 | 
                                    
                                    0.7%
                                 | |
| 350 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 213 |