| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 210 | 
                                    
                                    33.2%
                                 | 
| 1 | On duty | 121 | 
                                    
                                    19.1%
                                 | 
| 2 | On call | 301 | 
                                    
                                    47.6%
                                 | 
| Sysmiss | 636 |