| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not necessary | 248 | 
                                    
                                    12.5%
                                 | 
| 2 | Cannot continue | 3 | 
                                    
                                    0.2%
                                 | 
| 3 | Not Applicable | 1732 | 
                                    
                                    87.3%
                                 | 
| Sysmiss | 17 |