| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| -7 | Prices are regulated | 80 |
22.8%
|
| -6 | Prices set by HQ | 9 |
2.6%
|
| 1 | Yes | 40 |
11.4%
|
| 2 | No | 220 |
62.7%
|