| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 3175 | 
                                    
                                    89.7%
                                 | 
| 2 | yes, but with difficulty | 260 | 
                                    
                                    7.3%
                                 | 
| 3 | no | 104 | 
                                    
                                    2.9%
                                 | 
| Sysmiss | 16 |