| Value | Category | Cases | |
|---|---|---|---|
| 1 | Do not usually do it | 396 |
17.5%
|
| 2 | Increased | 305 |
13.5%
|
| 3 | Unchanged | 1522 |
67.1%
|
| 4 | Decreased | 40 |
1.8%
|
| 5 | Initially changed but has now returned to normal | 4 |
0.2%
|
| 98 | I do not know | 0 |
0%
|
| 99 | Refused | 0 |
0%
|