| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.4%
|
| -7 | Prices are regulated | 11 |
4.2%
|
| -6 | Prices set by HQ | 2 |
0.8%
|
| 1 | Yes | 50 |
19.3%
|
| 2 | No | 195 |
75.3%
|