| Value | Category | Cases | |
|---|---|---|---|
| 1 | Many problems | 18 | 
                                    
                                    1.9%
                                 | 
| 2 | Some problems | 44 | 
                                    
                                    4.7%
                                 | 
| 3 | Few problems | 70 | 
                                    
                                    7.5%
                                 | 
| 4 | No problems | 802 | 
                                    
                                    85.9%
                                 | 
| Sysmiss | 1 |