| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 1448 | 
                                
                                52%
                             | 
| 1 | Yes | 89 | 
                                
                                3.2%
                             | 
| 5 | missing | 2 | 
                                
                                0.1%
                             | 
| 8 | dtk | 0 | 
                                
                                0%
                             | 
| 9 | na | 1245 | 
                                
                                44.7%
                             | 
| Sysmiss | 20 |