| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (sponatneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | FCA (free carrier) | 1 | 
                                    
                                    50%
                                 | 
| 2 | FAS (free alongside ship) | 0 | 
                                    
                                    0%
                                 | 
| 3 | FOB Origin (free on board) | 0 | 
                                    
                                    0%
                                 | 
| 4 | Other | 1 | 
                                    
                                    50%
                                 | 
| Sysmiss | 148 |