| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 120 | 
                                
                                4.3%
                             | 
| 1 | Yes | 6 | 
                                
                                0.2%
                             | 
| 5 | missing | 0 | 
                                
                                0%
                             | 
| 8 | dtk | 0 | 
                                
                                0%
                             | 
| 9 | na | 2643 | 
                                
                                95.4%
                             | 
| Sysmiss | 35 |