| Value | Category | Cases | |
|---|---|---|---|
| 1 | SI | 14 | 
                                    
                                    0.3%
                                 | 
| 2 | NO | 3089 | 
                                    
                                    74.9%
                                 | 
| 9 | NO RESPONDE | 4 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 1015 | 
                                    
                                    24.6%
                                 |