| Value | Category | Cases | |
|---|---|---|---|
| 0 | 173 | 
                                
                                78.6%
                             | |
| 1 | 41 | 
                                
                                18.6%
                             | |
| 99 | Not applicable | 6 | 
                                
                                2.7%
                             | 
| Sysmiss | 30 |