| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than then | 2409 | 
                                    
                                    10.3%
                                 | 
| 2 | The same as then | 10929 | 
                                    
                                    46.6%
                                 | 
| 3 | Less than then | 10120 | 
                                    
                                    43.1%
                                 | 
| Sysmiss | 1486 |