| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 2 | 
                                    
                                    1.2%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 1 | Increase | 4 | 
                                    
                                    2.4%
                                 | 
| 2 | Remain the same | 29 | 
                                    
                                    17.1%
                                 | 
| 3 | Decrease | 135 | 
                                    
                                    79.4%
                                 | 
| Sysmiss | 785 |