| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.3%
|
| -7 | Prices are regulated | 3 |
0.9%
|
| -6 | Prices set by HQ | 2 |
0.6%
|
| 1 | Yes | 72 |
22.5%
|
| 2 | No | 239 |
74.7%
|