| Value | Category | Cases | |
|---|---|---|---|
| 1 | Much more than usual | 31 |
2.6%
|
| 2 | More than usual | 142 |
12%
|
| 3 | Same as usual | 444 |
37.5%
|
| 4 | Less than usual | 305 |
25.8%
|
| 5 | Much less than usual | 259 |
21.9%
|
| 9 | Missing | 2 |
0.2%
|