| Value | Category | Cases | |
|---|---|---|---|
| 1 | Per day | 71 |
6.7%
|
| 2 | Per week | 204 |
19.1%
|
| 3 | Per month | 290 |
27.2%
|
| 4 | Per year | 501 |
47%
|
| Sysmiss | 347 |