| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
0.7%
|
| -7 | Prices are regulated | 30 |
3.5%
|
| -6 | Prices set by HQ | 23 |
2.7%
|
| 1 | Yes | 156 |
18.4%
|
| 2 | No | 635 |
74.7%
|