| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, always | 2 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, when item is out of stock | 53 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    
| 3 | No | 177 | 
                                                                 
                                    
                                    68.6%
                                 
                                                             | 
                                                        
                    
| 4 | Not applicable | 26 | 
                                                                 
                                    
                                    10.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 50 |