| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not at all | 1 | 
                                    
                                    1.1%
                                 | 
| 2 | Small extent | 8 | 
                                    
                                    9.1%
                                 | 
| 3 | Medium extent | 44 | 
                                    
                                    50%
                                 | 
| 4 | To a high extent | 35 | 
                                    
                                    39.8%
                                 | 
| Sysmiss | 662 |