| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 128 | 
                                    
                                    22.9%
                                 | 
| 1 | On duty | 428 | 
                                    
                                    76.7%
                                 | 
| 2 | On call | 2 | 
                                    
                                    0.4%
                                 | 
| Sysmiss | 710 |