| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 55 |
2.5%
|
| -7 | Prices are regulated | 74 |
3.4%
|
| -6 | Prices set by HQ | 61 |
2.8%
|
| 1 | Yes | 304 |
13.9%
|
| 2 | No | 1695 |
77.4%
|