| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 1 | Increase | 2 | 
                                    
                                    3.8%
                                 | 
| 2 | Remain the same | 8 | 
                                    
                                    15.4%
                                 | 
| 3 | Decrease | 42 | 
                                    
                                    80.8%
                                 | 
| Sysmiss | 903 |