| Valeur | Modalité | Cas | |
|---|---|---|---|
| 1 | Without any difficulty | 574 | 
                                    
                                    23.6%
                                 | 
| 2 | With some difficulty | 271 | 
                                    
                                    11.2%
                                 | 
| 3 | Not at all | 246 | 
                                    
                                    10.1%
                                 | 
| Sysmiss | 1339 |