| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 192 | 
                                    
                                    67.4%
                                 | 
| 1 | On duty | 16 | 
                                    
                                    5.6%
                                 | 
| 2 | On call | 77 | 
                                    
                                    27%
                                 | 
| Sysmiss | 983 |