| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 544 | 
                                    
                                    90.7%
                                 | 
| 2 | NO | 19 | 
                                    
                                    3.2%
                                 | 
| Sysmiss | 37 | 
                                    
                                    6.2%
                                 |