| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 13 | 
                                    
                                    0.5%
                                 | 
| -7 | Prices are regulated | 76 | 
                                    
                                    2.8%
                                 | 
| -6 | Prices set by HQ | 54 | 
                                    
                                    2%
                                 | 
| 1 | Yes | 948 | 
                                    
                                    35.2%
                                 | 
| 2 | No | 1606 | 
                                    
                                    59.5%
                                 |