| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.2%
|
| -7 | Prices are regulated | 66 |
10.6%
|
| -6 | Prices set by HQ | 5 |
0.8%
|
| 1 | Yes | 93 |
14.9%
|
| 2 | No | 458 |
73.5%
|