| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not applicable | 181 | 
                                    
                                    55.5%
                                 | 
| 1 | On duty | 45 | 
                                    
                                    13.8%
                                 | 
| 2 | On call | 100 | 
                                    
                                    30.7%
                                 | 
| Sysmiss | 942 |