| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.2%
|
| -7 | Prices are regulated | 38 |
6.4%
|
| -6 | Prices set by HQ | 13 |
2.2%
|
| 1 | Yes | 64 |
10.8%
|
| 2 | No | 476 |
80.4%
|