| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 120 | 
                                    
                                    8.8%
                                 | 
| 2 | NO | 148 | 
                                    
                                    10.9%
                                 | 
| Sysmiss | 1096 | 
                                    
                                    80.4%
                                 |