| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 158 | 
                                    
                                    25%
                                 | 
| 1 | On duty | 339 | 
                                    
                                    53.6%
                                 | 
| 2 | On call | 135 | 
                                    
                                    21.4%
                                 | 
| Sysmiss | 636 |