| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 254 |
8.2%
|
| -7 | Does not apply (spontaneous) | 1011 |
32.6%
|
| 1 | Increased | 118 |
3.8%
|
| 2 | Remained the Same | 1334 |
43%
|
| 3 | Decreased | 388 |
12.5%
|