| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 54 | 
                                    
                                    3.6%
                                 | 
| 2 | NO | 138 | 
                                    
                                    9.1%
                                 | 
| Sysmiss | 1329 | 
                                    
                                    87.4%
                                 |