| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 168 | 
                                    
                                    44.9%
                                 | 
| 1 | On duty | 46 | 
                                    
                                    12.3%
                                 | 
| 2 | On call | 160 | 
                                    
                                    42.8%
                                 | 
| Sysmiss | 894 |