| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Increase | 64 | 
                                    
                                    33.2%
                                 | 
| 2 | Remain the same | 128 | 
                                    
                                    66.3%
                                 | 
| 3 | Decrease | 1 | 
                                    
                                    0.5%
                                 | 
| Sysmiss | 49 |