| Value | Category | Cases | |
|---|---|---|---|
| -999 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -888 | Not available | 0 | 
                                    
                                    0%
                                 | 
| 1 | About the same | 20 | 
                                    
                                    41.7%
                                 | 
| 2 | Higher volume of trade | 6 | 
                                    
                                    12.5%
                                 | 
| 3 | Lower volume of trade | 22 | 
                                    
                                    45.8%
                                 |