| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 11 | 
                                    
                                    1.1%
                                 | 
| 2 | NO | 30 | 
                                    
                                    2.9%
                                 | 
| 98 | NO RESPONDE | 5 | 
                                    
                                    0.5%
                                 | 
| Sysmiss | 986 | 
                                    
                                    95.5%
                                 |