| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 121 | 
                                    
                                    19.2%
                                 | 
| 1 | On duty | 503 | 
                                    
                                    79.7%
                                 | 
| 2 | On call | 7 | 
                                    
                                    1.1%
                                 | 
| Sysmiss | 637 |