| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 167 | 
                                    
                                    24.7%
                                 | 
| 1 | On duty | 371 | 
                                    
                                    54.9%
                                 | 
| 2 | On call | 138 | 
                                    
                                    20.4%
                                 | 
| Sysmiss | 592 |