| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| -7 | Prices are regulated | 81 |
22.5%
|
| -6 | Prices set by HQ | 9 |
2.5%
|
| 1 | Yes | 44 |
12.2%
|
| 2 | No | 224 |
62.2%
|