| Value | Category | Cases | |
|---|---|---|---|
| -8 | Refusal (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Male | 148 | 
                                    
                                    45%
                                 | 
| 2 | Female | 181 | 
                                    
                                    55%
                                 | 
| Sysmiss | 626 |