| Value | Category | Cases | |
|---|---|---|---|
| 0 | The price has decrease | 18 |
26.5%
|
| 1 | The price has remained unchanged | 9 |
13.2%
|
| 2 | The price has increased | 41 |
60.3%
|
| -9 | 35 | ||
| -7 | 30 |