| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 1 | 
                                    
                                    1.6%
                                 | 
| 1 | increased | 15 | 
                                    
                                    24.6%
                                 | 
| 2 | remained the same | 41 | 
                                    
                                    67.2%
                                 | 
| 3 | decreased | 4 | 
                                    
                                    6.6%
                                 | 
| Sysmiss | 894 |