| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 147 | 
                                    
                                    17.6%
                                 | 
| 1 | On duty | 600 | 
                                    
                                    71.8%
                                 | 
| 2 | On call | 89 | 
                                    
                                    10.6%
                                 | 
| Sysmiss | 432 |