| Value | Category | Cases | |
|---|---|---|---|
| 1 | Per day | 43 |
3.7%
|
| 2 | Per week | 149 |
12.9%
|
| 3 | Per month | 408 |
35.4%
|
| 4 | Per year | 551 |
47.9%
|
| Sysmiss | 262 |