| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 1149 | 
                                    
                                    14%
                                 | 
| 2 | NO | 4470 | 
                                    
                                    54.4%
                                 | 
| Sysmiss | 2598 | 
                                    
                                    31.6%
                                 |