| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, observed | 823 | 
                                    
                                    51.3%
                                 | 
| 2 | Yes, not observed | 373 | 
                                    
                                    23.2%
                                 | 
| 3 | No | 409 | 
                                    
                                    25.5%
                                 | 
| Sysmiss | 362 |