| Value | Category | Cases | |
|---|---|---|---|
| 0 | 36 | 
                                
                                47.4%
                             | |
| 1 | 40 | 
                                
                                52.6%
                             | |
| 99 | Not applicable | 0 | 
                                
                                0%
                             | 
| Sysmiss | 174 |